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CVE-2026-119209 (GCVE-0-2026-119209)

Vulnerability from nvd – Published: 2026-10-29 20:43 – Updated: 2026-10-30 16:00

Title

pypdf: Possible large memory usage when parsing cross-reference streams

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory while opening a crafted PDF containing cross-reference streams that declare very large entry counts. Highly compressible streams and /Prev chains can multiply the number of parsed entries across a document, while negative /Index counts can bypass the existing per-stream clamp. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:47 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4269	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/a93fe3a901…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
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                "id": "CVE-2026-119209",
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
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            "baseSeverity": "HIGH",
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            "subConfidentialityImpact": "NONE",
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              "cweId": "CWE-770",
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          ]
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          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-x3rh-gjgm-fmqc",
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          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-x3rh-gjgm-fmqc"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4269",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4269"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/a93fe3a901fd00af38f0a105c3ba7175fa72dcb4",
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        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.3"
        }
      ],
      "source": {
        "advisory": "GHSA-x3rh-gjgm-fmqc",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible large memory usage when parsing cross-reference streams"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-119209",
    "datePublished": "2026-10-29T20:43:03.072Z",
    "dateReserved": "2026-10-29T16:04:48.729Z",
    "dateUpdated": "2026-10-30T16:00:30.516Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-119208 (GCVE-0-2026-119208)

Vulnerability from nvd – Published: 2026-10-29 20:41 – Updated: 2026-11-04 01:45

Title

pypdf: Possible long runtimes/large memory usage for encrypted PDF files

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page count of a crafted encrypted PDF whose page tree declares a forged /Count value. Even after successful decryption, page-count retrieval trusts the unvalidated declared count instead of walking the page tree, allowing the attacker-controlled value to drive excessive work and memory use. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-04 01:44 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4270	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/82b91951dc…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
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    "adp": [
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        "metrics": [
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                "id": "CVE-2026-119208",
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                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-04T01:44:58.307267Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
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    "cna": {
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          "product": "pypdf",
          "vendor": "py-pdf",
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "attackComplexity": "LOW",
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          ],
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        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4270",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4270"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b",
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      ],
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        "advisory": "GHSA-62m5-6wh8-28x7",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes/large memory usage for encrypted PDF files"
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  },
  "cveMetadata": {
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-119207 (GCVE-0-2026-119207)

Vulnerability from nvd – Published: 2026-10-29 20:38 – Updated: 2026-10-30 17:12

Title

pypdf: Possible large memory usage for exceptions in strict mode

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory when strict mode loads a crafted invalid PDF dictionary. Nested parsing failures add repeated exception text to newly raised errors, allowing a small malformed dictionary to amplify into very large error messages. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 17:12 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4265	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/64270258c0…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119207",
                "options": [
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T17:12:29.821934Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "vendor": "py-pdf",
          "versions": [
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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      "source": {
        "advisory": "GHSA-4vqv-7265-gm2w",
        "discovery": "UNKNOWN"
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      "title": "pypdf: Possible large memory usage for exceptions in strict mode"
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}

CVE-2026-119206 (GCVE-0-2026-119206)

Vulnerability from nvd – Published: 2026-10-29 20:37 – Updated: 2026-11-03 16:41

Title

pypdf: Possible long runtimes when retrieving page labels

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-03 16:41 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4251	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/b891fef370…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119206",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-03T16:41:04.264522Z",
                "version": "2.0.3"
              },
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-03T16:41:47.790Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.21.3"
            }
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        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
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            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4251",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4251"
        },
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          "name": "https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e",
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          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.3",
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      ],
      "source": {
        "advisory": "GHSA-42gh-23hr-vphw",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes when retrieving page labels"
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    "dateUpdated": "2026-11-03T16:41:47.790Z",
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  },
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CVE-2026-119205 (GCVE-0-2026-119205)

Vulnerability from nvd – Published: 2026-10-29 20:35 – Updated: 2026-10-30 16:00

Title

pypdf: Possible infinite loop when cloning dictionaries

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:47 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4288	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/f176db1a1f…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
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            "attackComplexity": "LOW",
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          "tags": [
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CVE-2026-119204 (GCVE-0-2026-119204)

Vulnerability from nvd – Published: 2026-10-29 20:34 – Updated: 2026-11-04 01:42

Title

pypdf: Possible large memory usage when parsing page tree

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-04 01:42 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4290	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/ea4ac66313…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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          "tags": [
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CVE-2026-119203 (GCVE-0-2026-119203)

Vulnerability from nvd – Published: 2026-10-29 20:30 – Updated: 2026-10-30 17:11

Title

pypdf: Possible infinite loop when hitting EOF in standard xref table during trailer search

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 17:10 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4289	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/06593f9937…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119203",
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          ],
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        },
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          "name": "https://github.com/py-pdf/pypdf/pull/4289",
          "tags": [
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CVE-2026-115585 (GCVE-0-2026-115585)

Vulnerability from nvd – Published: 2026-10-23 19:31 – Updated: 2026-10-30 15:56

Title

pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:56 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-407 - Inefficient Algorithmic Complexity

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4240	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/68a0e5046c…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115585",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T15:56:24.413370Z",
                "version": "2.0.3"
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        ],
        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
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              "version": "\u003c 6.21.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
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            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
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      "problemTypes": [
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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          ]
        },
        {
          "descriptions": [
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              "description": "CWE-407: Inefficient Algorithmic Complexity",
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          ]
        }
      ],
      "providerMetadata": {
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      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4240",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4240"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2"
        }
      ],
      "source": {
        "advisory": "GHSA-jr96-gvgh-j3r4",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115585",
    "datePublished": "2026-10-23T19:31:52.598Z",
    "dateReserved": "2026-10-22T22:53:15.238Z",
    "dateUpdated": "2026-10-30T15:56:32.681Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-115580 (GCVE-0-2026-115580)

Vulnerability from nvd – Published: 2026-10-23 19:29 – Updated: 2026-10-29 18:01

Title

pypdf: Possible long runtimes for large xref table header limits

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-29 18:01 UTC

CWE

CWE-834 - Excessive Iteration

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4239	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/a3061e34b1…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115580",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-29T18:01:08.614500Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-29T18:01:23.279Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.21.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-834",
              "description": "CWE-834: Excessive Iteration",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T19:29:49.845Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-gmh7-3g9r-mjh5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-gmh7-3g9r-mjh5"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4239",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4239"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/a3061e34b169d34478d520f5f049c53cfb1482b2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/a3061e34b169d34478d520f5f049c53cfb1482b2"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2",
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            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2"
        }
      ],
      "source": {
        "advisory": "GHSA-gmh7-3g9r-mjh5",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes for large xref table header limits"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115580",
    "datePublished": "2026-10-23T19:29:49.845Z",
    "dateReserved": "2026-10-22T22:53:15.238Z",
    "dateUpdated": "2026-10-29T18:01:23.279Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-115572 (GCVE-0-2026-115572)

Vulnerability from nvd – Published: 2026-10-23 19:24 – Updated: 2026-10-29 14:18

Title

pypdf: Possible long runtimes for repeated references to the same missing object

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-29 14:18 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4240	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/68a0e5046c…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115572",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-29T14:18:10.604281Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-29T14:18:40.569Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.21.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
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            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
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          ]
        }
      ],
      "providerMetadata": {
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      },
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        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-6c7f-9265-g8fw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-6c7f-9265-g8fw"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4240",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4240"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2"
        }
      ],
      "source": {
        "advisory": "GHSA-6c7f-9265-g8fw",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes for repeated references to the same missing object"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115572",
    "datePublished": "2026-10-23T19:24:51.055Z",
    "dateReserved": "2026-10-22T22:53:15.238Z",
    "dateUpdated": "2026-10-29T14:18:40.569Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-113795 (GCVE-0-2026-113795)

Vulnerability from nvd – Published: 2026-10-21 16:01 – Updated: 2026-10-30 15:58

Title

pypdf: Possible large memory usage for streams with multiple filters

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, accessing a crafted PDF stream with a large number of filters or multiple filters that pass around large amounts of data can cause large memory consumption. This issue is fixed in version 6.20.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:58 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4173	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/80a84d4be6…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-113795",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T15:58:24.825765Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-30T15:58:32.072Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.20.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
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          ]
        },
        {
          "descriptions": [
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      "providerMetadata": {
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      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4173",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4173"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.20.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.20.0"
        }
      ],
      "source": {
        "advisory": "GHSA-7mh2-4gg2-979f",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible large memory usage for streams with multiple filters"
    }
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    "datePublished": "2026-10-21T16:01:22.314Z",
    "dateReserved": "2026-10-20T17:39:41.373Z",
    "dateUpdated": "2026-10-30T15:58:32.072Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-113794 (GCVE-0-2026-113794)

Vulnerability from nvd – Published: 2026-10-21 15:59 – Updated: 2026-10-28 01:20

Title

pypdf: Possible infinite loop when hitting EOF in standard xref table

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 01:20 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/issues/4169	x_refsource_MISC
https://github.com/py-pdf/pypdf/pull/4170	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/37e1cd6817…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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CVE-2026-113793 (GCVE-0-2026-113793)

Vulnerability from nvd – Published: 2026-10-21 15:57 – Updated: 2026-10-28 17:01

Title

pypdf: Possible infinite loop when removing tree items

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 16:51 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4188	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/c9c35b4471…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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          "tags": [
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  },
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CVE-2026-113792 (GCVE-0-2026-113792)

Vulnerability from nvd – Published: 2026-10-21 15:55 – Updated: 2026-10-23 15:12

Title

pypdf: Possible infinite loop in PdfWriter.find_outline_item

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-23 14:47 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4188	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/c9c35b4471…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-113792",
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          "tags": [
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CVE-2026-113791 (GCVE-0-2026-113791)

Vulnerability from nvd – Published: 2026-10-21 15:37 – Updated: 2026-10-30 15:57

Title

pypdf: Possible large memory usage when parsing content streams

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:57 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4218	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/18bd2981a7…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-113791",
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        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
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          ],
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        },
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          "url": "https://github.com/py-pdf/pypdf/pull/4218"
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    "dateUpdated": "2026-10-30T15:57:39.880Z",
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CVE-2026-113790 (GCVE-0-2026-113790)

Vulnerability from nvd – Published: 2026-10-21 15:35 – Updated: 2026-10-28 01:18

Title

pypdf: Possible large memory usage when parsing arrays and dictionaries

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing arrays or dictionaries with many elements, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 01:18 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4218	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/18bd2981a7…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.0

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
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CVE-2026-113789 (GCVE-0-2026-113789)

Vulnerability from nvd – Published: 2026-10-21 15:33 – Updated: 2026-10-28 16:42

Title

pypdf: Possible long runtimes/large memory usage when retrieving form fields

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF that causes large memory usage or long runtimes when an application retrieves the document's form fields. This issue is fixed in version 6.21.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 16:42 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-407 - Inefficient Algorithmic Complexity

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4219	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/5ef728f0e1…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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CVE-2026-119209 (GCVE-0-2026-119209)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:43 – Updated: 2026-10-30 16:00

Title

pypdf: Possible large memory usage when parsing cross-reference streams

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory while opening a crafted PDF containing cross-reference streams that declare very large entry counts. Highly compressible streams and /Prev chains can multiply the number of parsed entries across a document, while negative /Index counts can bypass the existing per-stream clamp. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:47 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4269	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/a93fe3a901…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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      ],
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      },
      "title": "pypdf: Possible large memory usage when parsing cross-reference streams"
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CVE-2026-119208 (GCVE-0-2026-119208)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:41 – Updated: 2026-11-04 01:45

Title

pypdf: Possible long runtimes/large memory usage for encrypted PDF files

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page count of a crafted encrypted PDF whose page tree declares a forged /Count value. Even after successful decryption, page-count retrieval trusts the unvalidated declared count instead of walking the page tree, allowing the attacker-controlled value to drive excessive work and memory use. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-04 01:44 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4270	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/82b91951dc…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119208",
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      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-62m5-6wh8-28x7",
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          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-62m5-6wh8-28x7"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4270",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/py-pdf/pypdf/pull/4270"
        },
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          "name": "https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b",
          "tags": [
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      ],
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        "advisory": "GHSA-62m5-6wh8-28x7",
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      },
      "title": "pypdf: Possible long runtimes/large memory usage for encrypted PDF files"
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-119207 (GCVE-0-2026-119207)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:38 – Updated: 2026-10-30 17:12

Title

pypdf: Possible large memory usage for exceptions in strict mode

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory when strict mode loads a crafted invalid PDF dictionary. Nested parsing failures add repeated exception text to newly raised errors, allowing a small malformed dictionary to amplify into very large error messages. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 17:12 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4265	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/64270258c0…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119207",
                "options": [
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                    "Exploitation": "none"
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                  },
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                    "Technical Impact": "partial"
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                "timestamp": "2026-10-30T17:12:29.821934Z",
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          "shortName": "CISA-ADP"
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          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
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            }
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
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            "baseSeverity": "HIGH",
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-29T20:38:54.611Z",
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      },
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        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vqv-7265-gm2w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vqv-7265-gm2w"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4265",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4265"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/64270258c0eced720f7960aecf8cef31afd39f8d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/64270258c0eced720f7960aecf8cef31afd39f8d"
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        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.3",
          "tags": [
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          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.3"
        }
      ],
      "source": {
        "advisory": "GHSA-4vqv-7265-gm2w",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible large memory usage for exceptions in strict mode"
    }
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    "dateReserved": "2026-10-29T16:04:48.729Z",
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    "state": "PUBLISHED"
  },
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}

CVE-2026-119206 (GCVE-0-2026-119206)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:37 – Updated: 2026-11-03 16:41

Title

pypdf: Possible long runtimes when retrieving page labels

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-03 16:41 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4251	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/b891fef370…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119206",
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                    "Exploitation": "none"
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          "product": "pypdf",
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            {
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      "metrics": [
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          "cvssV4_0": {
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      ],
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      },
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    "dateReserved": "2026-10-29T16:04:48.729Z",
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    "state": "PUBLISHED"
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}

CVE-2026-119205 (GCVE-0-2026-119205)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:35 – Updated: 2026-10-30 16:00

Title

pypdf: Possible infinite loop when cloning dictionaries

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:47 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4288	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/f176db1a1f…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119205",
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      }
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        }
      ],
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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-mfr5-77xh-9j7h"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4288",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4288"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/f176db1a1f7f9af3e472e69a843ef1175653b044",
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          ],
          "url": "https://github.com/py-pdf/pypdf/commit/f176db1a1f7f9af3e472e69a843ef1175653b044"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.4",
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          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.4"
        }
      ],
      "source": {
        "advisory": "GHSA-mfr5-77xh-9j7h",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible infinite loop when cloning dictionaries"
    }
  },
  "cveMetadata": {
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    "cveId": "CVE-2026-119205",
    "datePublished": "2026-10-29T20:35:33.902Z",
    "dateReserved": "2026-10-29T16:04:48.729Z",
    "dateUpdated": "2026-10-30T16:00:42.997Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-119204 (GCVE-0-2026-119204)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:34 – Updated: 2026-11-04 01:42

Title

pypdf: Possible large memory usage when parsing page tree

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-04 01:42 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4290	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/ea4ac66313…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
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      "metrics": [
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            "attackComplexity": "LOW",
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        },
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          "tags": [
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CVE-2026-119203 (GCVE-0-2026-119203)

Vulnerability from cvelistv5 – Published: 2026-10-29 20:30 – Updated: 2026-10-30 17:11

Title

pypdf: Possible infinite loop when hitting EOF in standard xref table during trailer search

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 17:10 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4289	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/06593f9937…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119203",
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        }
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      "metrics": [
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            "attackComplexity": "LOW",
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          ],
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        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4289",
          "tags": [
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          ],
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  },
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CVE-2026-115585 (GCVE-0-2026-115585)

Vulnerability from cvelistv5 – Published: 2026-10-23 19:31 – Updated: 2026-10-30 15:56

Title

pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:56 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-407 - Inefficient Algorithmic Complexity

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4240	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/68a0e5046c…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-115585",
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                    "Technical Impact": "partial"
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        }
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          ],
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        },
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          "tags": [
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CVE-2026-115580 (GCVE-0-2026-115580)

Vulnerability from cvelistv5 – Published: 2026-10-23 19:29 – Updated: 2026-10-29 18:01

Title

pypdf: Possible long runtimes for large xref table header limits

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-29 18:01 UTC

CWE

CWE-834 - Excessive Iteration

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4239	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/a3061e34b1…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
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          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
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            "subConfidentialityImpact": "NONE",
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            "userInteraction": "PASSIVE",
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          }
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              "cweId": "CWE-834",
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            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T19:29:49.845Z",
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      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-gmh7-3g9r-mjh5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-gmh7-3g9r-mjh5"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4239",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4239"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/a3061e34b169d34478d520f5f049c53cfb1482b2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/a3061e34b169d34478d520f5f049c53cfb1482b2"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2"
        }
      ],
      "source": {
        "advisory": "GHSA-gmh7-3g9r-mjh5",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes for large xref table header limits"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2026-10-23T19:29:49.845Z",
    "dateReserved": "2026-10-22T22:53:15.238Z",
    "dateUpdated": "2026-10-29T18:01:23.279Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-115572 (GCVE-0-2026-115572)

Vulnerability from cvelistv5 – Published: 2026-10-23 19:24 – Updated: 2026-10-29 14:18

Title

pypdf: Possible long runtimes for repeated references to the same missing object

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-29 14:18 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4240	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/68a0e5046c…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.21.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.21.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115572",
                "options": [
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                    "Technical Impact": "partial"
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          "vendor": "py-pdf",
          "versions": [
            {
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseSeverity": "HIGH",
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      ],
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        "dateUpdated": "2026-10-23T19:24:51.055Z",
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          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-6c7f-9265-g8fw",
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-6c7f-9265-g8fw"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4240",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/py-pdf/pypdf/pull/4240"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b"
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          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.21.2"
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      ],
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        "advisory": "GHSA-6c7f-9265-g8fw",
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  },
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CVE-2026-113795 (GCVE-0-2026-113795)

Vulnerability from cvelistv5 – Published: 2026-10-21 16:01 – Updated: 2026-10-30 15:58

Title

pypdf: Possible large memory usage for streams with multiple filters

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, accessing a crafted PDF stream with a large number of filters or multiple filters that pass around large amounts of data can cause large memory consumption. This issue is fixed in version 6.20.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:58 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4173	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/80a84d4be6…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-113795",
                "options": [
                  {
                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T15:58:24.825765Z",
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        "providerMetadata": {
          "dateUpdated": "2026-10-30T15:58:32.072Z",
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
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            "subConfidentialityImpact": "NONE",
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      },
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          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f",
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4173",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/py-pdf/pypdf/pull/4173"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185",
          "tags": [
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          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.20.0",
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          ],
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      ],
      "source": {
        "advisory": "GHSA-7mh2-4gg2-979f",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible large memory usage for streams with multiple filters"
    }
  },
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "dateReserved": "2026-10-20T17:39:41.373Z",
    "dateUpdated": "2026-10-30T15:58:32.072Z",
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  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-113794 (GCVE-0-2026-113794)

Vulnerability from cvelistv5 – Published: 2026-10-21 15:59 – Updated: 2026-10-28 01:20

Title

pypdf: Possible infinite loop when hitting EOF in standard xref table

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 01:20 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/issues/4169	x_refsource_MISC
https://github.com/py-pdf/pypdf/pull/4170	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/37e1cd6817…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-113794",
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                    "Exploitation": "none"
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                  },
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                    "Technical Impact": "partial"
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          "product": "pypdf",
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            {
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
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            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
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          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-39mj-jf6j-2qj3"
        },
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          "name": "https://github.com/py-pdf/pypdf/issues/4169",
          "tags": [
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          ],
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          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.20.0"
        }
      ],
      "source": {
        "advisory": "GHSA-39mj-jf6j-2qj3",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible infinite loop when hitting EOF in standard xref table"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-113794",
    "datePublished": "2026-10-21T15:59:26.054Z",
    "dateReserved": "2026-10-20T17:39:41.373Z",
    "dateUpdated": "2026-10-28T01:20:41.647Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-113793 (GCVE-0-2026-113793)

Vulnerability from cvelistv5 – Published: 2026-10-21 15:57 – Updated: 2026-10-28 17:01

Title

pypdf: Possible infinite loop when removing tree items

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 16:51 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7868 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/4188	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/c9c35b4471…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.20.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.20.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-113793",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-28T16:51:43.110456Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-28T17:01:30.870Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.20.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-835",
              "description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T15:57:55.600Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/4188",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/4188"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0",
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            "x_refsource_MISC"
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          "url": "https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0"
        },
        {
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          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.20.1"
        }
      ],
      "source": {
        "advisory": "GHSA-9mx8-4j7g-633p",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible infinite loop when removing tree items"
    }
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  "cveMetadata": {
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    "datePublished": "2026-10-21T15:57:55.600Z",
    "dateReserved": "2026-10-20T17:39:41.373Z",
    "dateUpdated": "2026-10-28T17:01:30.870Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Find a vulnerability

Search criteria

142 vulnerabilities found for pypdf by py-pdf

CVE-2026-119209 (GCVE-0-2026-119209)

CVE-2026-119208 (GCVE-0-2026-119208)

CVE-2026-119207 (GCVE-0-2026-119207)

CVE-2026-119206 (GCVE-0-2026-119206)

CVE-2026-119205 (GCVE-0-2026-119205)

CVE-2026-119204 (GCVE-0-2026-119204)

CVE-2026-119203 (GCVE-0-2026-119203)

CVE-2026-115585 (GCVE-0-2026-115585)

CVE-2026-115580 (GCVE-0-2026-115580)

CVE-2026-115572 (GCVE-0-2026-115572)

CVE-2026-113795 (GCVE-0-2026-113795)

CVE-2026-113794 (GCVE-0-2026-113794)

CVE-2026-113793 (GCVE-0-2026-113793)

CVE-2026-113792 (GCVE-0-2026-113792)

CVE-2026-113791 (GCVE-0-2026-113791)

CVE-2026-113790 (GCVE-0-2026-113790)

CVE-2026-113789 (GCVE-0-2026-113789)

CVE-2026-119209 (GCVE-0-2026-119209)

CVE-2026-119208 (GCVE-0-2026-119208)

CVE-2026-119207 (GCVE-0-2026-119207)

CVE-2026-119206 (GCVE-0-2026-119206)

CVE-2026-119205 (GCVE-0-2026-119205)

CVE-2026-119204 (GCVE-0-2026-119204)

CVE-2026-119203 (GCVE-0-2026-119203)

CVE-2026-115585 (GCVE-0-2026-115585)

CVE-2026-115580 (GCVE-0-2026-115580)

CVE-2026-115572 (GCVE-0-2026-115572)

CVE-2026-113795 (GCVE-0-2026-113795)

CVE-2026-113794 (GCVE-0-2026-113794)

CVE-2026-113793 (GCVE-0-2026-113793)