What is GHSA-6vvc-x485-93v7?

GHSA-6vvc-x485-93v7 is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible long runtimes/large memory usage when retrieving form fields

Which CVE IDs does GHSA-6vvc-x485-93v7 cover?

GHSA-6vvc-x485-93v7 covers the following CVE IDs: CVE-2026-113789. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-6vvc-x485-93v7?

GHSA-6vvc-x485-93v7 affects 1 product, including: pip/pypdf:\u003c 6.21.0.

GHSA-6vvc-x485-93v7Medium

pypdf: Possible long runtimes/large memory usage when retrieving form fields

Vendor

GitHub Security Advisories

Published

October 22, 2026

Last Modified

October 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-113789 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage and/or long runtimes. This requires retrieving the form fields of a document.

Patches

This has been fixed in pypdf==6.21.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4219.

🎯 Affected products1

pip/pypdf:< 6.21.0

🔗 References (6)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-6vvc-x485-93v7
https://nvd.nist.gov/vuln/detail/CVE-2026-113789
https://github.com/py-pdf/pypdf/pull/4219
https://github.com/py-pdf/pypdf/commit/5ef728f0e16d225c853e89f861ba0a67402fe3f2
https://github.com/py-pdf/pypdf/releases/tag/6.21.0
https://github.com/advisories/GHSA-6vvc-x485-93v7