CVE-2026-56376

ImageMagick - Heap Use-After-Free in Meta Coder

State: Published
Severity: 6.3 Medium
Published: Jun 23, 2026
Updated: Oct 29, 2026
Reserved: Jun 21, 2026

Description

ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing 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-416 Use After Free

Affected Products

Product	Versions
ImageMagickImageMagick	7.0.0 to before 7.1.2-15Affected 7.1.2-15Not affected
ImageMagickImageMagick	before 6.9.13-40Affected 6.9.13-40Not affected

References

GitHub Security Advisory (GHSA-2gq3-ww97-wfjm)vendor-advisory
VulnCheck Advisory: ImageMagick - Heap Use-After-Free in Meta Coderthird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.