CVE-2026-102994: Pypdf Project Pypdf

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

Affected products

• Pypdf Project Pypdf: before 6.18.0 (fixed in 6.18.0)

Published 2026-09-30. Last modified 2026-10-05.