Resource exhaustion in Py-pdf Pypdf

CVE-2026-71870

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…

Vulnerability class: DoS (Denial of Service)

Affected products

Weakness classification (CWE)

References