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VULNERABILITIES

CVE-2026-40260 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8 [email protected]Patch
https://github.com/py-pdf/pypdf/pull/3724 [email protected]Issue TrackingPatch
https://github.com/py-pdf/pypdf/releases/tag/6.10.0 [email protected]ProductRelease Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx [email protected]MitigationPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')[email protected]

Affected Products

ProductVersions
pypdf project pypdf
< 6.10.0

CPE

  • cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40260
NVD Published Date:
Apr 17, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-40260 Details - Not Deferred