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Moderate severityNVD Advisory· Published Feb 24, 2026· Updated Feb 26, 2026

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

CVE-2026-25966

Description

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: 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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
Magick.NET-Q16-AnyCPUNuGet
< 14.10.314.10.3
Magick.NET-Q16-HDRI-AnyCPUNuGet
< 14.10.314.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q16-HDRI-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q16-HDRI-x64NuGet
< 14.10.314.10.3
Magick.NET-Q16-HDRI-x86NuGet
< 14.10.314.10.3
Magick.NET-Q16-OpenMP-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q16-OpenMP-x64NuGet
< 14.10.314.10.3
Magick.NET-Q16-OpenMP-x86NuGet
< 14.10.314.10.3
Magick.NET-Q16-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q16-x64NuGet
< 14.10.314.10.3
Magick.NET-QMagick.NET-Q16-x8616-x64NuGet
< 14.10.314.10.3
Magick.NET-Q8-AnyCPUNuGet
< 14.10.314.10.3
Magick.NET-Q8-OpenMP-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q8-OpenMP-x64NuGet
< 14.10.314.10.3
Magick.NET-Q8-arm64NuGet
< 14.10.314.10.3
Magick.NET-Q8-x86NuGet
< 14.10.314.10.3

Affected products

34

Patches

Vulnerability mechanics

References

5

News mentions

0

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