CVE-2026-59205CWE-787

Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch

High · published July 14, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
31.4
In the wild
Unconfirmed
What it is

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform's declared output mode. This issue is fixed in version 12.3.0.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00385 · 31.4th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-07-14T15:48Z
EPSS history
Timeline
  • 14 JUL 15:48Z
    Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch
    cvelistv5