GitHub Advisoryadvisory · NuGet
GHSA-xwc6-v6g8-pw2h ImageMagick's Security Policy Bypass through config/policy-secure.xml via "fd handler" leads to stdin/stdout access
MEDIUM
Official page ↗
- Aliases
- CVE-2026-25966
- Ecosystem
- NuGet
- Packages
- Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-OpenMP-arm64, Magick.NET-Q16-HDRI-arm64, Magick.NET-Q16-HDRI-x64, Magick.NET-Q16-HDRI-x86, Magick.NET-Q16-OpenMP-arm64, Magick.NET-Q16-OpenMP-x64, Magick.NET-Q16-OpenMP-x86, Magick.NET-Q16-arm64, Magick.NET-Q16-x64, Magick.NET-QMagick.NET-Q16-x8616-x64, Magick.NET-Q8-AnyCPU, Magick.NET-Q8-OpenMP-arm64, Magick.NET-Q8-OpenMP-x64, Magick.NET-Q8-arm64, Magick.NET-Q8-x86
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weaknesses
- CWE-284
- Reviewed
- 2026-02-24
Affected packages
• NuGet Magick.NET-Q16-AnyCPU: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-HDRI-AnyCPU: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-HDRI-OpenMP-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-HDRI-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-HDRI-x64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-HDRI-x86: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-OpenMP-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-OpenMP-x64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-OpenMP-x86: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q16-x64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-QMagick.NET-Q16-x8616-x64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q8-AnyCPU: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q8-OpenMP-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q8-OpenMP-x64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q8-arm64: < 14.10.3 → fixed in 14.10.3
• NuGet Magick.NET-Q8-x86: < 14.10.3 → fixed in 14.10.3
Description
The shipped “secure” security policy includes a rule intended to prevent reading/writing from standard streams:
```xml
```
However, ImageMagick also supports fd: pseudo-filenames (e.g., fd:0, fd:1). This path form is not blocked by the secure policy templates, and therefore bypasses the protection goal of “no stdin/stdout”.
To resolve this, users can add the following change to their security policy.
```xml
```
And this will also be included in ImageMagick's more secure policies by default.
Related
Alias · CVE (1)
- CVE-2026-25966 ImageMagick is free and open-source software used for editing and manipulating digital images. vulnerability
Weakness · CWE (1)
- CWE-284 Improper Access Control weakness
References
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-xwc6-v6g8-pw2h web
- https://nvd.nist.gov/vuln/detail/CVE-2026-25966 advisory
- https://github.com/ImageMagick/ImageMagick/commit/8d4c67a90ae458fb36393a05c0069e9123ac174c web
- https://github.com/ImageMagick/ImageMagick package
- https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3 web