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GHSA-9mx8-4j7g-633p

pypdf: Possible infinite loop when removing tree items

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-113793

Packages

EcosystemPackageAffectedFixed in
PyPI pypdf < 6.20.1 6.20.1

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 removing an object from a tree, for example an outline item. ### Patches This has been fixed in [pypdf==6.20.1](https://github.com/py-pdf/pypdf/releases/tag/6.20.1). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4188](https://github.com/py-pdf/pypdf/pull/4188).

References

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