GHSA-2q4j-m29v-hq73

pypdf has possible Infinite Loop when processing outlines/bookmarks

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-24688

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.6.2	6.6.2

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 accessing the outlines/bookmarks. ### Patches This has been fixed in [pypdf 6.6.2](https://github.com/py-pdf/pypdf/releases/tag/6.6.2). ### Workarounds If projects cannot upgrade yet, consider applying the changes from PR [#3610](https://github.com/py-pdf/pypdf/pull/3610).

References

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

https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73 web
https://nvd.nist.gov/vuln/detail/CVE-2026-24688 advisory
https://github.com/py-pdf/pypdf/pull/3610 web
https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1 web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.6.2 web