CVE-2026-49460: Pypdf Project Pypdf

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, 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. This vulnerability is fixed in 6.12.2.

Affected products

• Pypdf Project Pypdf: before 6.12.2 (fixed in 6.12.2)

Published 2026-06-22. Last modified 2026-06-25.