CVE-2026-54651

Updated on 09 Jul 2026

Severity

6.9 Medium severity

Details

CVSS score
6.9
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

About vulnerability

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer.

Patches

This has been fixed in [pypdf==6.13.1](https://github.com/py-pdf/pypdf/releases/tag/6.13.1).

Workarounds

If users cannot upgrade yet, consider applying the changes from PR [#3839](https://github.com/py-pdf/pypdf/pull/3839).

Details

Affected product:
pypdf
Affected packages:
pypdf @ 5.9.0.post11+tuxcare

Fixes