CVE-2026-56362

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.

Score

CVSS 3.1 4.2 Medium

Status

Analyzed - disclosure@vulncheck.com

Published

2026-07-08

Last modified

2026-07-08

Weaknesses

CWE-125

Affected products

• Imagemagick (Imagemagick)

References

• https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-gq5v-qf8q-fp77
• https://www.vulncheck.com/advisories/imagemagick-heap-buffer-overflow-read-in-getpixelindex-via-openpixelcache-metadata…