CVE-2026-54058 | Pillow is a Python imaging library. Prior to 12.3.0, when Pi… | CVSS 8.3 HIGH

Description

Pillow is a Python imaging library. Prior to 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. This issue is fixed in version 12.3.0.

Metadata

CVE ID: CVE-2026-54058
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-11 18:24 UTC
Published: 2026-07-14 16:27 UTC
Last updated: 2026-07-14 17:54 UTC
Primary CWE: CWE-125
CWE-125: Out-of-bounds Read
Vendor / Product: python-pillow / Pillow
Sources: cve.org · NVD

Severity & Metrics

8.3 HIGH CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
python-pillow	Pillow	—	< 12.3.0

Weakness (CWE)

CWE	Source	Description
CWE-125	cna	CWE-125: Out-of-bounds Read

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.3	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

References (4)

https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93 https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93
https://github.com/python-pillow/Pillow/pull/9719 https://github.com/python-pillow/Pillow/pull/9719
https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d
https://github.com/python-pillow/Pillow/releases/tag/12.3.0 https://github.com/python-pillow/Pillow/releases/tag/12.3.0