PT-2026-49729 · Pypi · Pypdf

Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-49460

OSV

CVSS v4.0

5.1

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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.

Fix

Weakness Enumeration

CWE-407

Related Identifiers

CVE-2026-49460

GHSA-5HGR-HG42-57JG

Affected Products

Pypdf

References · 5

• https://osv.dev/vulnerability/GHSA-5hgr-hg42-57jg · Vendor Advisory
• https://github.com/py-pdf/pypdf/pull/3806 · Note
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg · Note
• https://github.com/py-pdf/pypdf/releases/tag/6.12.2 · Note
• https://github.com/py-pdf/pypdf · Note