VULNERABILITY INTELLIGENCE

CVE-2026-28351

CVSS score5.3 MEDIUM
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-02-27
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

Weakness classification

  • security-advisories@github.com: CWE-400

Primary references