CVE-2026-113795

Summary

pypdf: Possible large memory usage for streams with multiple filters

Severity

medium

EPSS

0.5% (p40)

CWE

CWE-400, CWE-770

Also known as

GHSA-7mh2-4gg2-979f

Published

2026-10-21

Updated

2026-10-21

Advisory details

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing any stream with a large amount of filters or multiple filters which pass around large amounts of data.

Patches

This has been fixed in pypdf==6.20.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4173.

References

• https://github.com/advisories/GHSA-7mh2-4gg2-979f
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f
• https://github.com/py-pdf/pypdf/pull/4173
• https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185
• https://github.com/py-pdf/pypdf/releases/tag/6.20.0

Related advisories

• CVE-2026-102993 — high · PyPI/pypdf
• CVE-2026-113791 — medium · PyPI/pypdf
• CVE-2026-115572 — high · PyPI/pypdf
• CVE-2026-115585 — high · PyPI/pypdf
• CVE-2026-102999 — high · PyPI/pypdf
• CVE-2026-102998 — high · PyPI/pypdf
• CVE-2026-103000 — high · PyPI/pypdf
• CVE-2026-102997 — high · PyPI/pypdf

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