CVE-2026-102993: Pypdf Project Pypdf

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

Affected products

• Pypdf Project Pypdf: before 6.17.0 (fixed in 6.17.0)

Published 2026-09-30. Last modified 2026-10-02.