GHSA-qfv9-64jg-mh7p

pypdf: Possible infinite loop in PdfWriter.find_outline_item

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-113792

Packages

Ecosystem	Package	Affected	Fixed 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 calling `find_outline_item` on a `PdfWriter`. ### 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.

https://github.com/py-pdf/pypdf/security/advisories/GHSA-qfv9-64jg-mh7p web
https://github.com/py-pdf/pypdf/pull/4188 web
https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0 web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.20.1 web