CVE-2026-54651 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-06-22T21:16:25.680

CVSS

6.9

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, 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. This vulnerability is fixed in 6.13.1.

Sources

• CVE-2026-54651
• Issue Tracking
• Patch
• Mitigation, Patch, Vendor Advisory