CVE-2026-113794: pypdf < 6.20.0

Affected technology

pypdf · < 6.20.0
py-pdf

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · Passive user interaction

What an attacker can do

An attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. Vendor/CNA’s CVSS 4.0 assessment (base score 6.0/10) rates confidentiality and integrity impact as none; availability impact as high.