CVE-2026-71870

MEDIUM

CVE: CVE-2026-71870 - pypdf is a free and open-source pure-python PDF librarySign in to save

CVSS

4.8

CVSS v4.0

EPSS

0.1%

Exploit Prediction Score

Published

August 7, 2026

Exploitability

EPSS probability 0.1%

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.

Weaknesses

CWE-400

Affected Packages

No package data available.

Aliases

CVE-2026-71870

Related references

Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa
https://github.com/py-pdf/pypdf/pull/3944
https://github.com/py-pdf/pypdf/releases/tag/6.15.0
https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c