# CVE-2026-56367: ImageMagick integer overflow in PSB RLE decoding Source: https://junglewise.ai/threats/cve-2026-56367-imagemagick-integer-overflow-in-psb-rle-decoding Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Published: 2026-06-21. Updated: 2026-06-21 License: CC BY 4.0 with a link back CVE-2026-56367 · Severity: low · CVSS 3.7 · Published 2026-06-21 ImageMagick is a widely used software suite for displaying, converting, and editing image files. A vulnerability in how it handles large Photoshop (PSB) files on 32-bit systems could allow an attacker to crash the application or potentially access sensitive information from the computer's memory. This occurs when the software processes a specially crafted image file, which could impact services that automatically process user-uploaded images. Technologies: [Magick.NET-Q16-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-anycpu), [Magick.NET-Q16-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-arm64), [Magick.NET-Q16-HDRI-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-anycpu), [Magick.NET-Q16-HDRI-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-arm64), [Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-arm64), [Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-x64), [Magick.NET-Q16-HDRI-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x64), [Magick.NET-Q16-HDRI-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x86), [Magick.NET-Q16-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-arm64), [Magick.NET-Q16-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x64), [Magick.NET-Q16-OpenMP-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x86), [Magick.NET-Q16-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-x64), [Magick.NET-Q16-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-x86), [Magick.NET-Q8-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-anycpu), [Magick.NET-Q8-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-arm64), [Magick.NET-Q8-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-openmp-arm64), [Magick.NET-Q8-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-openmp-x64), [Magick.NET-Q8-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-x64), [Magick.NET-Q8-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-x86). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget). ## Quick answers **Is CVE-2026-56367 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56367 being exploited in the wild. **How severe is CVE-2026-56367?** Low severity, with a CVSS score of 3.7, published 21 June 2026. **Which products and versions are affected?** Magick.NET-Q16-AnyCPU (NuGet) < 14.10.3; Magick.NET-Q16-arm64 (NuGet) < 14.10.3; Magick.NET-Q16-HDRI-AnyCPU (NuGet) < 14.10.3; Magick.NET-Q16-HDRI-arm64 (NuGet) < 14.10.3; and 15 more. **Is there a fix for CVE-2026-56367?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it. **How is CVE-2026-56367 attacked?** It is attacked over the network, in a software library. **Am I affected by CVE-2026-56367?** Check whether you run Magick.NET-Q16-AnyCPU (NuGet), Magick.NET-Q16-arm64 (NuGet), Magick.NET-Q16-HDRI-AnyCPU (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you. ## Technical details An integer overflow vulnerability exists in the ReadPSDChannelRLE function within coders/psd.c of ImageMagick. The flaw is triggered during the RLE decoding of PSB (PSD version 2) files specifically on 32-bit architectures. An attacker can exploit this by providing a crafted PSB file, leading to a heap-based out-of-bounds read. This can result in a denial-of-service (crash) or the disclosure of sensitive memory contents. The issue is addressed in versions 7.1.2-15 and 6.9.13-40. ## Affected products - ImageMagick ImageMagick < 7.1.2-15, < 6.9.13-40 (32-bit builds) ## Identifiers - CVE-2026-56367 - GHSA-273h-m46v-96q4 ## Timeline - 2026-02-23: advisory: GitHub Security Advisory published - 2026-06-21: disclosed: NVD publication date ## References - [https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-273h-m46v-96q4](https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-273h-m46v-96q4) - [https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-psb-rle-decoding](https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-psb-rle-decoding) ## Related threats - [ImageMagick integer overflow in JNX decoder](https://junglewise.ai/threats/cve-2026-62946-imagemagick-integer-overflow-in-jnx-decoder) - [ImageMagick heap buffer overflow in fx operation](https://junglewise.ai/threats/cve-2026-62363-imagemagick-heap-buffer-overflow-in-fx-operation) - [ImageMagick heap buffer overwrite in morphology operation](https://junglewise.ai/threats/cve-2026-62343-imagemagick-heap-buffer-overwrite-in-morphology-operation) - [ImageMagick memory leak in magick CLI via invalid options](https://junglewise.ai/threats/cve-2026-66011-imagemagick-memory-leak-in-magick-cli-via-invalid-options) - [ImageMagick memory leak in TIFF encoder](https://junglewise.ai/threats/cve-2026-61872-imagemagick-memory-leak-in-tiff-encoder)