CVE-2026-71852: Pypdf Project Pypdf

Low severity, CVSS 3.3. EPSS: 0.1% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries during text extraction. This issue is fixed in 6.15.0.

Affected products

• Pypdf Project Pypdf: before 6.15.0 (fixed in 6.15.0)

Published 2026-08-07. Last modified 2026-10-05.