CVE-2026-27024

MEDIUM6.9

pypdf has a possible infinite loop when processing TreeObject

Published Feb 20, 2026

Modified 3 weeks ago

Details

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. This vulnerability is fixed in 6.7.1.

References

WEB

https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d1295

WEB

https://github.com/py-pdf/pypdf/pull/3645

WEB

https://github.com/py-pdf/pypdf/releases/tag/6.7.1

WEB

https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-27024

CVSS Analysis