What is GHSA-4pxv-j86v-mhcw?

GHSA-4pxv-j86v-mhcw is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible long runtimes for wrong size values in incremental mode

Which CVE IDs does GHSA-4pxv-j86v-mhcw cover?

GHSA-4pxv-j86v-mhcw covers the following CVE IDs: CVE-2026-41313. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-4pxv-j86v-mhcw?

GHSA-4pxv-j86v-mhcw has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

Which products are affected by GHSA-4pxv-j86v-mhcw?

GHSA-4pxv-j86v-mhcw affects 1 product, including: pip/pypdf:\u003c 6.10.2.

GHSA-4pxv-j86v-mhcwMediumCVSS 6.5

pypdf: Possible long runtimes for wrong size values in incremental mode

Vendor

GitHub Security Advisories

Published

April 16, 2026

Last Modified

May 5, 2026

🔗 CVE IDs covered (1)

CVE-2026-41313 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer /Size value in incremental mode.

Patches

This has been fixed in pypdf==6.10.2.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3735.

🎯 Affected products1

pip/pypdf:< 6.10.2

🔗 References (6)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw
https://github.com/py-pdf/pypdf/pull/3735
https://github.com/py-pdf/pypdf/releases/tag/6.10.2
https://nvd.nist.gov/vuln/detail/CVE-2026-41313
https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a
https://github.com/advisories/GHSA-4pxv-j86v-mhcw