ImageMagick's Security Policy Bypass through config/policy-secure.xml via "fd handler" leads to stdin/stdout access

Summary

ImageMagick is free and open-source software used for editing and manipulating digital images. The shipped "secure" security policy includes a rule intended to prevent reading/writing from standard streams. However, ImageMagick also supports fd:<n> pseudo-filenames (e.g., fd:0, fd:1). Prior to versions 7.1.2-15 and 6.9.13-40, this path form is not blocked by the secure policy templates, and therefore bypasses the protection goal of "no stdin/stdout." Versions 7.1.2-15 and 6.9.13-40 contain a patch by including a change to the more secure policies by default. As a workaround, add the change to one's security policy manually.

Timeline

1. Feb 24, 2026, 1:27 AM UTCCVE published
2. Feb 26, 2026, 9:02 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Jun 23, 2026, 3:48 PM UTCRecord last updated

Affected versions

• ImageMagick ImageMagick

  From 7.0.0 · fixed in 7.1.2-15; fixed in 6.9.13-40

• Magick.NET-Q16-AnyCPUNuGet

  fixed in 14.10.3

• Magick.NET-Q16-HDRI-AnyCPUNuGet

  fixed in 14.10.3

• Magick.NET-Q16-HDRI-OpenMP-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-HDRI-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-HDRI-x64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-HDRI-x86NuGet

  fixed in 14.10.3

• Magick.NET-Q16-OpenMP-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-OpenMP-x64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-OpenMP-x86NuGet

  fixed in 14.10.3

• Magick.NET-Q16-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q16-x64NuGet

  fixed in 14.10.3

• Magick.NET-QMagick.NET-Q16-x8616-x64NuGet

  fixed in 14.10.3

• Magick.NET-Q8-AnyCPUNuGet

  fixed in 14.10.3

• Magick.NET-Q8-OpenMP-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q8-OpenMP-x64NuGet

  fixed in 14.10.3

• Magick.NET-Q8-arm64NuGet

  fixed in 14.10.3

• Magick.NET-Q8-x86NuGet

  fixed in 14.10.3

References 1