GitHub Advisoryadvisory · PyPI

GHSA-2q4j-m29v-hq73 pypdf has possible Infinite Loop when processing outlines/bookmarks

MEDIUM Published 2026-01-26 Modified 2026-01-29 Official page ↗
Aliases
CVE-2026-24688
Ecosystem
PyPI
Packages
pypdf
Severity
Moderate
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weaknesses
CWE-835
Reviewed
2026-01-26

Affected packages

• PyPI pypdf: < 6.6.2 → fixed in 6.6.2

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. Patches This has been fixed in pypdf 6.6.2. Workarounds If projects cannot upgrade yet, consider applying the changes from PR #3610.

Related

Alias · CVE (1)

  • CVE-2026-24688 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (1)

  • CWE-835 Loop with Unreachable Exit Condition weakness

References