What is GHSA-5hgr-hg42-57jg?

GHSA-5hgr-hg42-57jg is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Inefficient decoding of FlateDecode PNG predictor streams

Which CVE IDs does GHSA-5hgr-hg42-57jg cover?

GHSA-5hgr-hg42-57jg covers the following CVE IDs: CVE-2026-49460. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-5hgr-hg42-57jg?

GHSA-5hgr-hg42-57jg affects 1 product, including: pip/pypdf:\u003c 6.12.2.

GHSA-5hgr-hg42-57jgMedium

pypdf: Inefficient decoding of FlateDecode PNG predictor streams

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-49460 →

📋 Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor.

Patches

This has been fixed in pypdf==6.12.2.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3806.

🎯 Affected products1

pip/pypdf:< 6.12.2

🔗 References (4)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg
https://github.com/py-pdf/pypdf/pull/3806
https://github.com/py-pdf/pypdf/releases/tag/6.12.2
https://github.com/advisories/GHSA-5hgr-hg42-57jg