GitHub Advisoryadvisory · PyPI

GHSA-3crg-w4f6-42mx pypdf: Manipulated XMP metadata entity declarations can exhaust RAM

MEDIUM Published 2026-04-10 Modified 2026-04-24 Official page ↗
Aliases
CVE-2026-40260
Ecosystem
PyPI
Packages
pypdf
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-776
Reviewed
2026-04-10

Affected packages

• PyPI pypdf: < 6.10.0 → fixed in 6.10.0

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. Patches This has been fixed in pypdf==6.10.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR #3724.

Related

Alias · CVE (1)

  • CVE-2026-40260 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (1)

  • CWE-776 Improper Restriction of Recursive Entity References in DTDs weakness

References