What is GHSA-jp53-mhqp-8xcg?

GHSA-jp53-mhqp-8xcg is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible infinite loop for TreeObject.insert_child

Which CVE IDs does GHSA-jp53-mhqp-8xcg cover?

GHSA-jp53-mhqp-8xcg covers the following CVE IDs: CVE-2026-84309. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-jp53-mhqp-8xcg?

GHSA-jp53-mhqp-8xcg affects 1 product, including: pip/pypdf:\u003c 6.16.0.

GHSA-jp53-mhqp-8xcgMedium

pypdf: Possible infinite loop for TreeObject.insert_child

Vendor

GitHub Security Advisories

Published

September 1, 2026

Last Modified

September 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-84309 →

📋 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.

🎯 Affected products1

pip/pypdf:< 6.16.0

🔗 References (5)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jp53-mhqp-8xcg
https://github.com/py-pdf/pypdf/pull/3964
https://github.com/py-pdf/pypdf/commit/c9ba557d565d57c53a0b3a0be06c0a4c29b0559b
https://github.com/py-pdf/pypdf/releases/tag/6.16.0
https://github.com/advisories/GHSA-jp53-mhqp-8xcg