CVE-2026-71870: 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 large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap 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.