pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/py-pdf/pypdf/commit/e51d07807ffcdaf18077b9486dadb3dc05b368da Patch
- https://github.com/py-pdf/pypdf/pull/3502 Patch
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jfx9-29x2-rv3j Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.6 · pypdf_projectNVD modified 2026-10-08 11:10
Affected (CPE criteria) 1
cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*