What is GHSA-fwg2-594c-jp42?

GHSA-fwg2-594c-jp42 is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible long runtimes/large memory usage for large CID font width ranges

Which CVE IDs does GHSA-fwg2-594c-jp42 cover?

GHSA-fwg2-594c-jp42 covers the following CVE IDs: CVE-2026-71852. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-fwg2-594c-jp42?

GHSA-fwg2-594c-jp42 affects 1 product, including: pip/pypdf:\u003c 6.15.0.

GHSA-fwg2-594c-jp42Medium

pypdf: Possible long runtimes/large memory usage for large CID font width ranges

Vendor

GitHub Security Advisories

Published

August 7, 2026

Last Modified

August 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-71852 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the font width entries of a font with unusually large values, for example during text extraction.

Patches

This has been fixed in pypdf==6.15.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3946.

🎯 Affected products1

pip/pypdf:< 6.15.0

🔗 References (5)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-fwg2-594c-jp42
https://github.com/py-pdf/pypdf/pull/3946
https://github.com/py-pdf/pypdf/commit/51cb6acf9e8a35b77e90b4d87d28fe3e1416d7d7
https://github.com/py-pdf/pypdf/releases/tag/6.15.0
https://github.com/advisories/GHSA-fwg2-594c-jp42