CVE-2026-113793

Summary

pypdf: Possible infinite loop when removing tree items

Severity

medium

EPSS

0.5% (p40)

CWE

CWE-835

Also known as

GHSA-9mx8-4j7g-633p

Published

2026-10-21

Updated

2026-10-21

Advisory details

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires removing an object from a tree, for example an outline item.

Patches

This has been fixed in pypdf==6.20.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4188.

References

• https://github.com/advisories/GHSA-9mx8-4j7g-633p
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p
• https://github.com/py-pdf/pypdf/pull/4188
• https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0
• https://github.com/py-pdf/pypdf/releases/tag/6.20.1

Related advisories

• CVE-2026-59935 — high · PyPI/pypdf
• CVE-2026-59936 — high · PyPI/pypdf
• CVE-2026-113792 — medium · PyPI/pypdf
• CVE-2026-113794 — medium · PyPI/pypdf
• CVE-2026-84309 — medium · PyPI/pypdf
• CVE-2026-54651 — medium · PyPI/pypdf
• CVE-2026-115572 — high · PyPI/pypdf
• CVE-2026-115585 — high · PyPI/pypdf

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