CVE-2026-27026 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-02-20T22:16:29.023

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 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1.

Sources

• CVE-2026-27026
• Patch
• Issue Tracking, Patch
• Product, Release Notes
• Patch, Vendor Advisory