CVE-2026-59204CWE-789

Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service

High · published July 14, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
31.4
In the wild
Unconfirmed
What it is

Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00385 · 31.4th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-07-14T15:38Z
EPSS history
Timeline
  • 14 JUL 15:38Z
    Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service
    cvelistv5