Ghostwire

CVE-2026-71870: pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory...

MEDIUM CVSS 0.0 Exploit Available

Published: August 7, 2026 | Last Modified: August 9, 2026

Description

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.

Ghostwire Analysis — What This Means Practically

Exploit code is reported to be available, increasing the likelihood of active exploitation.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

Security Coverage (1 articles)

References

github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c
github.com/py-pdf/pypdf/pull/3944
github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa
github.com/py-pdf/pypdf/releases/tag/6.15.0
github.com/advisories/GHSA-fp3f-mc75-235c
www.tenable.com/cve/CVE-2026-71870
www.cnnvd.org.cn/home/globalSearch?keyword=CVE-2026-71870