ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds

MEDIUM 4.7CVE-2026-62946 · GHSA-h22j-f9xw-xjjm · Published 30/07/2026 · updated 03/08/2026

Package	Affected versions	Patched versions
Magick.NET-Q16-AnyCPU NuGet	`< 14.15.0`	`14.15.0`
Magick.NET-Q16-HDRI-AnyCPU NuGet	`< 14.15.0`	`14.15.0`
Magick.NET-Q16-HDRI-x86 NuGet	`< 14.15.0`	`14.15.0`
Magick.NET-Q16-x86 NuGet	`< 14.15.0`	`14.15.0`
Magick.NET-Q8-AnyCPU NuGet	`< 14.15.0`	`14.15.0`
Magick.NET-Q8-x86 NuGet	`< 14.15.0`	`14.15.0`
imagemagick imagemagick	`≥ 7.0.0-0, < 7.1.2-27< 6.9.13-52`	`7.1.2-276.9.13-52`

Description

When processing an extremely large JNX file on 32-bit platforms an integer overflow will happen that can cause a heap buffer over-write.

NVD description

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions prior to both 6.9.13-52 and 7.1.2-27, processing an extremely large JNX file on 32-bit platforms can cause an integer overflow, leading to a heap buffer over-write. This issue has been fixed in versions 6.9.13-52 and 7.1.2-27.

References

ImageMagick/ImageMagick security advisory · WEB
ImageMagick/ImageMagick · PACKAGE
dlemstra/Magick.NET release 14.15.0 · WEB

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free