What is GHSA-jr96-gvgh-j3r4?

GHSA-jr96-gvgh-j3r4 is a security advisory published by GitHub Security Advisories with High severity. pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

Which CVE IDs does GHSA-jr96-gvgh-j3r4 cover?

GHSA-jr96-gvgh-j3r4 covers the following CVE IDs: CVE-2026-115585. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-jr96-gvgh-j3r4?

GHSA-jr96-gvgh-j3r4 affects 1 product, including: pip/pypdf:\u003c 6.21.2.

GHSA-jr96-gvgh-j3r4High

pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

Vendor

GitHub Security Advisories

Published

October 23, 2026

Last Modified

October 23, 2026

🔗 CVE IDs covered (1)

CVE-2026-115585 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with repeated malformed cross-reference streams.

Patches

This has been fixed in pypdf==6.21.2.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4240.

Notes

This is a follow-up to https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v, which had the side-effect of still loading the whole stream again despite the cache being present.

🎯 Affected products1

pip/pypdf:< 6.21.2

🔗 References (5)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4
https://github.com/py-pdf/pypdf/pull/4240
https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b
https://github.com/py-pdf/pypdf/releases/tag/6.21.2
https://github.com/advisories/GHSA-jr96-gvgh-j3r4