What is GHSA-m2v9-299j-rv96?

GHSA-m2v9-299j-rv96 is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible infinite loop when processing outlines/bookmarks in writer

Which CVE IDs does GHSA-m2v9-299j-rv96 cover?

GHSA-m2v9-299j-rv96 covers the following CVE IDs: CVE-2026-54531. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-m2v9-299j-rv96?

GHSA-m2v9-299j-rv96 affects 1 product, including: pip/pypdf:\u003c 6.13.0.

GHSA-m2v9-299j-rv96Medium

pypdf: Possible infinite loop when processing outlines/bookmarks in writer

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-54531 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with outlines into a writer.

Patches

This has been fixed in pypdf==6.13.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3830.

🎯 Affected products1

pip/pypdf:< 6.13.0

🔗 References (4)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-m2v9-299j-rv96
https://github.com/py-pdf/pypdf/pull/3830
https://github.com/py-pdf/pypdf/releases/tag/6.13.0
https://github.com/advisories/GHSA-m2v9-299j-rv96