Vulnerability-Lookup

OPENSUSE-SU-2026:21928-1

Vulnerability from csaf_opensuse - Published: 2026-09-21 13:55 - Updated: 2026-11-10 16:02

Summary

Security update for python-weasyprint

Severity

Moderate

Notes

Title of the patch: Security update for python-weasyprint

Description of the patch: This update for python-weasyprint fixes the following issues: Changes in python-weasyprint: - CVE-2026-55073: Server-Side Request Forgery (SSRF) (bsc#1279942)

Patchnames: openSUSE-Leap-16.0-packagehub-618

CVE-2026-55073

6.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Recommended 1 product

Product	Identifier	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:python313-weasyprint-0:65.1-bp160.4.1.noarch		—	Vendor Fix

Threats

Impact moderate

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/2…	self
https://bugzilla.suse.com/1279942	self
https://www.suse.com/security/cve/CVE-2026-55073/	self
https://www.suse.com/security/cve/CVE-2026-55073	external
https://bugzilla.suse.com/1279942	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
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      "text": "moderate"
    },
    "category": "csaf_security_advisory",
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    "distribution": {
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      },
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        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "openSUSE-Leap-16.0-packagehub-618",
        "title": "Patchnames"
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        "summary": "SUSE ratings",
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      },
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        "summary": "SUSE Bug 1279942",
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    ],
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      "revision_history": [
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          "date": "2026-09-24T17:48:25Z",
          "number": "2",
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          "number": "3",
          "summary": "unknown changes"
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  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
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                "name": "python313-weasyprint-0:65.1-bp160.4.1.noarch",
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      ],
      "notes": [
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          "category": "general",
          "text": "WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0.",
          "title": "CVE description"
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          "summary": "SUSE Bug 1279942 for CVE-2026-55073",
          "url": "https://bugzilla.suse.com/1279942"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Leap 16.0:python313-weasyprint-0:65.1-bp160.4.1.noarch"
          ]
        }
      ],
      "scores": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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    }
  ]
}

CVE-2026-55073 (GCVE-0-2026-55073)

Vulnerability from cvelistv5 – Published: 2026-09-14 16:55 – Updated: 2026-09-16 15:19

Title

WeasyPrint restrictive URL fetcher bypass allows local file read and SSRF

Summary

WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0.

Severity

6.2 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 15:18 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7886 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/Kozea/WeasyPrint/security/advi…	x_refsource_CONFIRM
https://github.com/Kozea/WeasyPrint/commit/289e27…	x_refsource_MISC
https://github.com/Kozea/WeasyPrint/releases/tag/v70.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Kozea	WeasyPrint	Affected: < 70.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55073",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-16T15:18:39.718323Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-16T15:19:03.064Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jf6q-chmf-3h3v"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "WeasyPrint",
          "vendor": "Kozea",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 70.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T16:55:12.333Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jf6q-chmf-3h3v",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jf6q-chmf-3h3v"
        },
        {
          "name": "https://github.com/Kozea/WeasyPrint/commit/289e278439b017cd9263b4cd4727026987f86443",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Kozea/WeasyPrint/commit/289e278439b017cd9263b4cd4727026987f86443"
        },
        {
          "name": "https://github.com/Kozea/WeasyPrint/releases/tag/v70.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Kozea/WeasyPrint/releases/tag/v70.0"
        }
      ],
      "source": {
        "advisory": "GHSA-jf6q-chmf-3h3v",
        "discovery": "UNKNOWN"
      },
      "title": "WeasyPrint restrictive URL fetcher bypass allows local file read and SSRF"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55073",
    "datePublished": "2026-09-14T16:55:12.333Z",
    "dateReserved": "2026-06-16T14:33:35.710Z",
    "dateUpdated": "2026-09-16T15:19:03.064Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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