CVE-2026-113793: pypdf: Possible infinite loop when removing tree items

October 21, 2026

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.

References

github.com/advisories/GHSA-9mx8-4j7g-633p
github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0
github.com/py-pdf/pypdf/pull/4188
github.com/py-pdf/pypdf/releases/tag/6.20.1
github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p
nvd.nist.gov/vuln/detail/CVE-2026-113793

Code Behaviors & Features

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