CVE-2026-28351 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-02-27T21:16:19.177

CVSS

6.9

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

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.

Sources

• CVE-2026-28351
• Patch
• Issue Tracking, Patch
• Release Notes
• Patch, Vendor Advisory