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35 vulnerabilities found for pypdf by py-pdf
CVE-2026-57204 (GCVE-0-2026-57204)
Vulnerability from nvd – Published: 2026-06-30 21:59 – Updated: 2026-07-01 14:29
VLAI
Title
pypdf: Missing stream length values ignore defined limits
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/releases/tag/6.13.3 | x_refsource_MISC |
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CVE-2026-54651 (GCVE-0-2026-54651)
Vulnerability from nvd – Published: 2026-06-22 20:28 – Updated: 2026-06-23 12:10
VLAI
Title
pypdf: Possible infinite loop when processing threads/articles in writer
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3839 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.13.1 | x_refsource_MISC |
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CVE-2026-54531 (GCVE-0-2026-54531)
Vulnerability from nvd – Published: 2026-06-22 20:26 – Updated: 2026-06-23 16:11
VLAI
Title
pypdf: Possible infinite loop when processing outlines/bookmarks in writer
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.0, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with outlines into a writer. This vulnerability is fixed in 6.13.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3830 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.13.0 | x_refsource_MISC |
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CVE-2026-54530 (GCVE-0-2026-54530)
Vulnerability from nvd – Published: 2026-06-22 20:25 – Updated: 2026-06-23 16:11
VLAI
Title
pypdf: Possible infinite loop when retrieving fonts for layout-mode text extraction
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.0, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires extracting the text in layout mode. This vulnerability is fixed in 6.13.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3830 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.13.0 | x_refsource_MISC |
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CVE-2026-49461 (GCVE-0-2026-49461)
Vulnerability from nvd – Published: 2026-06-22 20:27 – Updated: 2026-06-23 15:54
VLAI
Title
pypdf: Possible large memory usage for form XObjects during text extraction
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. This vulnerability is fixed in 6.12.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3805 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.12.2 | x_refsource_MISC |
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CVE-2026-49460 (GCVE-0-2026-49460)
Vulnerability from nvd – Published: 2026-06-22 20:28 – Updated: 2026-06-23 15:54
VLAI
Title
pypdf: Inefficient decoding of FlateDecode PNG predictor streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3806 | x_refsource_MISC |
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CVE-2026-48735 (GCVE-0-2026-48735)
Vulnerability from nvd – Published: 2026-05-28 14:49 – Updated: 2026-06-02 14:57
VLAI
Title
pypdf: Manipulated XMP metadata streams can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3796 | x_refsource_MISC |
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CVE-2026-48156 (GCVE-0-2026-48156)
Vulnerability from nvd – Published: 2026-05-28 14:50 – Updated: 2026-05-30 02:08
VLAI
Title
pypdf: Possible long runtimes for zero-only width values in cross-reference streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-834 - Excessive Iteration
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3791 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.12.0 | x_refsource_MISC |
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CVE-2026-48155 (GCVE-0-2026-48155)
Vulnerability from nvd – Published: 2026-05-28 14:51 – Updated: 2026-05-28 15:57
VLAI
Title
pypdf: Possible large memory usage for large offsets for layout mode text
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3790 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.12.0 | x_refsource_MISC |
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CVE-2026-41314 (GCVE-0-2026-41314)
Vulnerability from nvd – Published: 2026-04-22 21:08 – Updated: 2026-04-23 14:21
VLAI
Title
pypdf: Manipulated FlateDecode image dimensions can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using `/FlateDecode` with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3734 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/ac734dab4e… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.2 | x_refsource_MISC |
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CVE-2026-41313 (GCVE-0-2026-41313)
Vulnerability from nvd – Published: 2026-04-22 21:04 – Updated: 2026-04-23 16:24
VLAI
Title
pypdf: Possible long runtimes for wrong size values in incremental mode
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3735 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/c50a0104cf… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.2 | x_refsource_MISC |
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CVE-2026-41312 (GCVE-0-2026-41312)
Vulnerability from nvd – Published: 2026-04-22 21:02 – Updated: 2026-04-23 13:45
VLAI
Title
pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3734 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/ac734dab4e… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.2 | x_refsource_MISC |
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CVE-2026-41168 (GCVE-0-2026-41168)
Vulnerability from nvd – Published: 2026-04-22 20:49 – Updated: 2026-04-23 16:24
VLAI
Title
pypdf has possible long runtimes for wrong size values in cross-reference and object streams
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3733 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/62338e9d36… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.1 | x_refsource_MISC |
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CVE-2026-40260 (GCVE-0-2026-40260)
Vulnerability from nvd – Published: 2026-04-16 23:18 – Updated: 2026-04-17 18:42
VLAI
Title
pypdf: Manipulated XMP metadata entity declarations can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3724 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/b15a374e5c… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.0 | x_refsource_MISC |
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CVE-2026-33699 (GCVE-0-2026-33699)
Vulnerability from nvd – Published: 2026-03-26 23:58 – Updated: 2026-03-27 19:59
VLAI
Title
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
Summary
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3693 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.9.2 | x_refsource_MISC |
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CVE-2026-33123 (GCVE-0-2026-33123)
Vulnerability from nvd – Published: 2026-03-20 09:09 – Updated: 2026-03-20 18:07
VLAI
Title
pypdf has inefficient decoding of array-based streams
Summary
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3686 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.9.1 | x_refsource_MISC |
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CVE-2026-31826 (GCVE-0-2026-31826)
Vulnerability from nvd – Published: 2026-03-10 21:36 – Updated: 2026-03-11 15:59
VLAI
Title
pypdf: manipulated stream length values can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3675 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.8.0 | x_refsource_MISC |
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CVE-2026-28804 (GCVE-0-2026-28804)
Vulnerability from nvd – Published: 2026-03-06 06:46 – Updated: 2026-03-06 16:05
VLAI
Title
pypdf: Inefficient decoding of ASCIIHexDecode streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3666 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/648c627d26… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.5 | x_refsource_MISC |
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CVE-2026-28351 (GCVE-0-2026-28351)
Vulnerability from nvd – Published: 2026-02-27 20:59 – Updated: 2026-03-03 20:28
VLAI
Title
Manipulated RunLengthDecode streams can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.
Severity
SSVC
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Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3664 | x_refsource_MISC |
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CVE-2026-27888 (GCVE-0-2026-27888)
Vulnerability from nvd – Published: 2026-02-26 00:42 – Updated: 2026-06-23 15:49
VLAI
Title
pypdf: Manipulated FlateDecode XFA streams can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3658 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/7a4c8246ed… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.3 | x_refsource_MISC |
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CVE-2026-27628 (GCVE-0-2026-27628)
Vulnerability from nvd – Published: 2026-02-25 02:45 – Updated: 2026-02-27 19:49
VLAI
Title
pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/issues/3654 | x_refsource_MISC |
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CVE-2026-27026 (GCVE-0-2026-27026)
Vulnerability from nvd – Published: 2026-02-20 21:12 – Updated: 2026-02-24 18:47
VLAI
Title
pypdf possibly has long runtimes for malformed FlateDecode streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3644 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/7905842d83… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.1 | x_refsource_MISC |
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CVE-2026-27025 (GCVE-0-2026-27025)
Vulnerability from nvd – Published: 2026-02-20 21:11 – Updated: 2026-02-24 18:40
VLAI
Title
pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3646 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/77d7b8d7cf… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.1 | x_refsource_MISC |
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CVE-2026-27024 (GCVE-0-2026-27024)
Vulnerability from nvd – Published: 2026-02-20 21:10 – Updated: 2026-02-24 18:34
VLAI
Title
pypdf has a possible infinite loop when processing TreeObject
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. This vulnerability is fixed in 6.7.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3645 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/bd2f6d052f… | x_refsource_MISC |
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CVE-2026-24688 (GCVE-0-2026-24688)
Vulnerability from nvd – Published: 2026-01-27 19:44 – Updated: 2026-01-27 20:51
VLAI
Title
pypdf has possible Infinite Loop when processing outlines/bookmarks
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
4 references
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|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3610 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/b1282f8dcd… | x_refsource_MISC |
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CVE-2026-22691 (GCVE-0-2026-22691)
Vulnerability from nvd – Published: 2026-01-10 04:46 – Updated: 2026-01-12 16:48
VLAI
Title
pypdf has possible long runtimes for malformed startxref
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3594 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/294165726b… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.6.0 | x_refsource_MISC |
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CVE-2026-22690 (GCVE-0-2026-22690)
Vulnerability from nvd – Published: 2026-01-10 04:41 – Updated: 2026-01-12 17:07
VLAI
Title
pypdf has possible long runtimes for missing /Root object with large /Size values
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3594 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/294165726b… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.6.0 | x_refsource_MISC |
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CVE-2025-66019 (GCVE-0-2025-66019)
Vulnerability from nvd – Published: 2025-11-25 23:38 – Updated: 2026-01-20 18:33
VLAI
Title
pypdf manipulated LZWDecode streams can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patched in version 6.4.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/commit/96186725e5… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.4.0 | x_refsource_MISC |
| https://aydinnyunus.github.io/2025/12/20/cve-2025… |
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CVE-2025-62708 (GCVE-0-2025-62708)
Vulnerability from nvd – Published: 2025-10-22 21:36 – Updated: 2025-10-23 15:10
VLAI
Title
pypdf manipulated LZWDecode streams can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3502 | x_refsource_MISC |
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CVE-2025-62707 (GCVE-0-2025-62707)
Vulnerability from nvd – Published: 2025-10-22 21:36 – Updated: 2025-10-23 15:41
VLAI
Title
pypdf affected by possible infinite loop when reading DCT inline images without EOF marker
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. This has been fixed in pypdf version 6.1.3.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3501 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/f2864d6dd9… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.1.3 | x_refsource_MISC |
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