VULNERABILITY INTELLIGENCE

CVE-2026-27025

CVSS score5.5 MEDIUM
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-02-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.

Weakness classification

  • security-advisories@github.com: CWE-834

Primary references