CVE-2026-57204CWE-400

pypdf: Missing stream length values ignore defined limits

Medium · published June 30, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
29.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00367 · 29.4th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-06-30T21:59Z
EPSS history
Timeline
  • 30 JUN 21:59Z
    pypdf: Missing stream length values ignore defined limits
    cvelistv5