CVE-2026-42310CWE-835

Pillow: PDF Parsing Trailer Infinite Loop (DoS)

Medium · published May 9, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
6.9
In the wild
Unconfirmed
What it is

Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00177 · 6.9th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-05-09T04:10Z
EPSS history
Timeline
  • 09 MAY 04:10Z
    Pillow: PDF Parsing Trailer Infinite Loop (DoS)
    cvelistv5