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GHSA-jp53-mhqp-8xcg

pypdf: Possible infinite loop for TreeObject.insert_child

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-84309

Packages

EcosystemPackageAffectedFixed in
PyPI pypdf < 6.16.0 6.16.0

Details

As written in the advisory (Markdown source, shown as plain text).

### 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](https://github.com/py-pdf/pypdf/releases/tag/6.16.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3964](https://github.com/py-pdf/pypdf/pull/3964).

References

External links from the advisory. They lead to third-party sites.