CVE-2026-59204 | Pillow is a Python imaging library. From 8.2.0 through 12.2.… | CVSS 8.7 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-59204
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-02 21:05 UTC
Published: 2026-07-14 15:38 UTC
Last updated: 2026-07-14 15:38 UTC
Primary CWE: CWE-789
CWE-789: Memory Allocation with Excessive Size Value
Vendor / Product: python-pillow / Pillow
Sources: cve.org · NVD

Severity & Metrics

8.7 HIGH CVSS 4.0

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

Affected products (1)

Vendor	Product	Platform	Versions
python-pillow	Pillow	—	>= 8.2.0, < 12.3.0

Weakness (CWE)

CWE	Source	Description
CWE-789	cna	CWE-789: Memory Allocation with Excessive Size Value

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	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

References (4)

https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j
https://github.com/python-pillow/Pillow/pull/9704 https://github.com/python-pillow/Pillow/pull/9704
https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca
https://github.com/python-pillow/Pillow/releases/tag/12.3.0 https://github.com/python-pillow/Pillow/releases/tag/12.3.0