GHSA-cgf9-327m-v77cMedium
pypdf: Possible large memory usage when parsing content streams
🔗 CVE IDs covered (1)
📋 Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing content streams with many small operations.
Patches
This has been fixed in pypdf==6.21.0.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4218.
🎯 Affected products1
- pip/pypdf:< 6.21.0
🔗 References (6)
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c
- https://nvd.nist.gov/vuln/detail/CVE-2026-113791
- https://github.com/py-pdf/pypdf/pull/4218
- https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12
- https://github.com/py-pdf/pypdf/releases/tag/6.21.0
- https://github.com/advisories/GHSA-cgf9-327m-v77c