CVE-2026-27628: Pypdf Project Pypdf

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.

Affected products

• Pypdf Project Pypdf: before 6.7.2 (fixed in 6.7.2)

Published 2026-02-25. Last modified 2026-06-17.