What is GHSA-7mh2-4gg2-979f?

GHSA-7mh2-4gg2-979f is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible large memory usage for streams with multiple filters

Which CVE IDs does GHSA-7mh2-4gg2-979f cover?

GHSA-7mh2-4gg2-979f covers the following CVE IDs: CVE-2026-113795. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-7mh2-4gg2-979f?

GHSA-7mh2-4gg2-979f affects 1 product, including: pip/pypdf:\u003c 6.20.0.

GHSA-7mh2-4gg2-979fMedium

pypdf: Possible large memory usage for streams with multiple filters

Vendor

GitHub Security Advisories

Published

October 21, 2026

Last Modified

October 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-113795 →

📋 Description

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.

🎯 Affected products1

pip/pypdf:< 6.20.0

🔗 References (5)

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
https://github.com/advisories/GHSA-7mh2-4gg2-979f