CVE-2026-86421

ImageMagick before 7.1.2-30 Memory Leak via MSL decoder

State: Published
Severity: 6.3 Medium
Published: Sep 7, 2026
Updated: Oct 29, 2026
Reserved: Sep 7, 2026

Description

ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L	VulnCheck

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
ImageMagickImageMagick	7.0.0 to before 7.1.2-30Affected 7.1.2-30Not affected
ImageMagickImageMagick	before 6.9.13-55Affected 6.9.13-55Not affected

References

GitHub Security Advisory (GHSA-4jv7-q6xw-6f4x)vendor-advisory
VulnCheck Advisory: ImageMagick before 7.1.2-30 Memory Leak via MSL decoderthird-party-advisory

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