CVE-2026-56362

ImageMagick - Heap-buffer-overflow Read in GetPixelIndex via OpenPixelCache Metadata Desynchronization

State: Published
Severity: 2.1 Low
Published: Jul 8, 2026
Updated: Oct 29, 2026
Reserved: Jun 20, 2026

Description

ImageMagick before 7.1.2-15 contains a heap-buffer-overflow read vulnerability in GetPixelIndex caused by OpenPixelCache updating image channel metadata before pixel cache memory allocation. Attackers can trigger memory and disk allocation failures to cause a heap-buffer-overflow read affecting any writer calling GetPixelIndex.

Scores

CVSS	Score	Vector	Source
4.0	2.1 Low	CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	3.3 Low	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L	VulnCheck

Weaknesses

CWE-125 Out-of-bounds Read

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-gq5v-qf8q-fp77)vendor-advisory
VulnCheck Advisory: ImageMagick - Heap-buffer-overflow Read in GetPixelIndex via OpenPixelCache Metadata Desynchronizationthird-party-advisory

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