CVE-2026-24688

MEDIUM5.1

pypdf has possible Infinite Loop when processing outlines/bookmarks

Published Jan 27, 2026

Modified 1 months ago

Details

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.

References

WEB

https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1

WEB

https://github.com/py-pdf/pypdf/pull/3610

WEB

https://github.com/py-pdf/pypdf/releases/tag/6.6.2

WEB

https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-24688

CVSS Analysis