Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/f176db1a1f7f9af3e472e69a843ef1175653b044
- https://github.com/py-pdf/pypdf/pull/4288
- https://github.com/py-pdf/pypdf/releases/tag/6.21.4
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-mfr5-77xh-9j7h
FAQ
What is CVE-2026-119205?
CVE-2026-119205 is a documented vulnerability. pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked genera...
How severe is CVE-2026-119205?
CVSS scoring is not yet available for CVE-2026-119205. Check NVD for updates.
Is there a patch for CVE-2026-119205?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.