CVE-2026-119205

— UNSCOREDpublic exploit available

Published 2026-10-29 · Updated 2026-10-29

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD 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.

Weaknesses

CWE-835

Public exploit & PoC 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

All 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

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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