GitHub Advisoryadvisory · PyPI

GHSA-jp53-mhqp-8xcg pypdf: Possible infinite loop for TreeObject.insert_child

MEDIUM Published 2026-09-01 Modified 2026-09-01 Official page ↗
Aliases
CVE-2026-84309
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:H/SC:N/SI:N/SA:N
Weaknesses
CWE-835
Reviewed
2026-09-01

Affected packages

• PyPI pypdf: < 6.16.0 → fixed in 6.16.0

Description

Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires a (usually writing) code path where `TreeObject.insert_child` is involved. Patches This has been fixed in pypdf==6.16.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR #3964.

Related

Alias · CVE (1)

  • CVE-2026-84309 pypdf is a free and open-source pure-python PDF library. vulnerability

Weakness · CWE (1)

  • CWE-835 Loop with Unreachable Exit Condition weakness

References