GHSA-mfr5-77xh-9j7hHigh
pypdf has possible infinite loop when cloning dictionaries
🔗 CVE IDs covered (1)
📋 Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires cloning/duplicating a DictionaryObject.
Patches
This has been fixed in pypdf==6.21.4.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4288.
🎯 Affected products1
- pip/pypdf:< 6.21.4
🔗 References (6)
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-mfr5-77xh-9j7h
- https://nvd.nist.gov/vuln/detail/CVE-2026-119205
- https://github.com/py-pdf/pypdf/pull/4288
- https://github.com/py-pdf/pypdf/commit/f176db1a1f7f9af3e472e69a843ef1175653b044
- https://github.com/py-pdf/pypdf/releases/tag/6.21.4
- https://github.com/advisories/GHSA-mfr5-77xh-9j7h