CVE-2026-33123 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-03-20T10:16:18.717

CVSS

5.1

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. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.

Sources

• CVE-2026-33123
• Issue Tracking, Patch
• Product, Release Notes
• Patch, Vendor Advisory