CVE-2026-57204 — Vulnerability intelligence

py-pdf — pypdf

Published: 2026-06-30T22:16:57.700

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 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.

Sources

• CVE-2026-57204
• Product, Release Notes
• Patch, Vendor Advisory