pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa Patch
- https://github.com/py-pdf/pypdf/pull/3944 Patch
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c 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 4.8 · pypdf_projectNVD modified 2026-10-23 20:10
Affected (CPE criteria) 1
cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*