CVE-2026-48156 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-05-28T16:16:29.020

CVSS

5.1

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 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.

Sources

• CVE-2026-48156
• Issue Tracking, Patch
• Release Notes
• Patch, Vendor Advisory