CVE-2026-40311: Magick.NET Q16 AnyCPU ImageMagick Has A Heap-use-after-free Vulnerability

MODERATE
Advisory Identifier: GHSA-r83h-crwp-3vm7
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CVSS 5.5
CWE-693 CWE-416
Published
Advisory Summary

CVE-2026-40311 is a MODERATE (CVSS 5.5) imagemagick has a heap-use-after-free vulnerability (CWE-693: Protection Mechanism Failure) affecting Magick.NET Q16 AnyCPU libraries in the NuGet ecosystem. The issue involves imagemagick has a heap-use-after-free via xmp profile could result in a crash when printing the values.. Remediation is available by upgrading affected packages to version 14.12.0.

CVE-2026-40311 at a Glance

CVE Identifier CVE-2026-40311
GHSA Identifier GHSA-r83h-crwp-3vm7
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-693: Protection Mechanism Failure
Affected Product Magick.NET Q16 AnyCPU
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-40311

To remediate this vulnerability, upgrade all affected Magick.NET Q16 AnyCPU dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Magick.NET-Q16-AnyCPU fixed: 14.12.0 
Upgrade Magick.NET-Q16-AnyCPU to 14.12.0
Magick.NET-Q16-HDRI-AnyCPU fixed: 14.12.0 
Upgrade Magick.NET-Q16-HDRI-AnyCPU to 14.12.0
Magick.NET-Q16-HDRI-OpenMP-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.12.0
Magick.NET-Q16-HDRI-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-HDRI-arm64 to 14.12.0
Magick.NET-Q16-HDRI-x64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-HDRI-x64 to 14.12.0
Magick.NET-Q16-HDRI-x86 fixed: 14.12.0 
Upgrade Magick.NET-Q16-HDRI-x86 to 14.12.0
Magick.NET-Q16-OpenMP-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-OpenMP-arm64 to 14.12.0
Magick.NET-Q16-OpenMP-x64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-OpenMP-x64 to 14.12.0
Magick.NET-Q16-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-arm64 to 14.12.0
Magick.NET-Q16-x64 fixed: 14.12.0 
Upgrade Magick.NET-Q16-x64 to 14.12.0
Magick.NET-Q16-x86 fixed: 14.12.0 
Upgrade Magick.NET-Q16-x86 to 14.12.0
Magick.NET-Q8-AnyCPU fixed: 14.12.0 
Upgrade Magick.NET-Q8-AnyCPU to 14.12.0
Magick.NET-Q8-OpenMP-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q8-OpenMP-arm64 to 14.12.0
Magick.NET-Q8-arm64 fixed: 14.12.0 
Upgrade Magick.NET-Q8-arm64 to 14.12.0
Magick.NET-Q8-x64 fixed: 14.12.0 
Upgrade Magick.NET-Q8-x64 to 14.12.0
Magick.NET-Q8-x86 fixed: 14.12.0 
Upgrade Magick.NET-Q8-x86 to 14.12.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Magick.NET-Q16-AnyCPU

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-40311, inspect your project dependencies for Magick.NET Q16 AnyCPU:

inspect dependencies for Magick.NET-Q16-AnyCPU

Analyze the terminal output to locate any version of Magick.NET Q16 AnyCPU in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.12.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-693: Protection Mechanism Failure, where the product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. In Magick.NET Q16 AnyCPU, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An heap use after free when reading an invalid XMP profile could result in a crash due to an heap use after free when printing the values.

CVE-2026-40311 Affected Magick.NET Q16 AnyCPU Versions

16 component(s)
Fixed Versions:
14.12.0
Product / Package Ecosystem Affected Versions Fixed Version
Magick.NET-Q16-AnyCPU
nuget/Magick.NET-Q16-AnyCPU
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-HDRI-AnyCPU
nuget/Magick.NET-Q16-HDRI-AnyCPU
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-HDRI-OpenMP-arm64
nuget/Magick.NET-Q16-HDRI-OpenMP-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-HDRI-arm64
nuget/Magick.NET-Q16-HDRI-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-HDRI-x64
nuget/Magick.NET-Q16-HDRI-x64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-HDRI-x86
nuget/Magick.NET-Q16-HDRI-x86
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-OpenMP-arm64
nuget/Magick.NET-Q16-OpenMP-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-OpenMP-x64
nuget/Magick.NET-Q16-OpenMP-x64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-arm64
nuget/Magick.NET-Q16-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-x64
nuget/Magick.NET-Q16-x64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q16-x86
nuget/Magick.NET-Q16-x86
NuGet
< 14.12.0
14.12.0
Magick.NET-Q8-AnyCPU
nuget/Magick.NET-Q8-AnyCPU
NuGet
< 14.12.0
14.12.0
Magick.NET-Q8-OpenMP-arm64
nuget/Magick.NET-Q8-OpenMP-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q8-arm64
nuget/Magick.NET-Q8-arm64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q8-x64
nuget/Magick.NET-Q8-x64
NuGet
< 14.12.0
14.12.0
Magick.NET-Q8-x86
nuget/Magick.NET-Q8-x86
NuGet
< 14.12.0
14.12.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-r83h-crwp-3vm7
NVD — CVE-2026-40311 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40311
Security Fix Commit FIX COMMIT
https://github.com/ImageMagick/ImageMagick/commit/5facfecf1abb3fed46a08f614dcc43d1e548e20d
Magick.NET Q16 AnyCPU Source Repository REPOSITORY
https://github.com/ImageMagick/ImageMagick
Magick.NET Q16 AnyCPU Release RELEASE
https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19
Magick.NET Q16 AnyCPU Release RELEASE
https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0

Frequently Asked Questions

What is CVE-2026-40311?
CVE-2026-40311 is a security vulnerability in Magick.NET Q16 AnyCPU involving ImageMagick has a heap-use-after-free via XMP profile could result in a crash when printing the values. under CWE-693: Protection Mechanism Failure.
Which Magick.NET Q16 AnyCPU versions are affected?
Affected versions include releases prior to 14.12.0 across affected 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-arm64, Magick.NET-Q16-x64, Magick.NET-Q16-x86, Magick.NET-Q8-AnyCPU, Magick.NET-Q8-OpenMP-arm64, Magick.NET-Q8-arm64, Magick.NET-Q8-x64, Magick.NET-Q8-x86.
What version fixes CVE-2026-40311?
Upgrading to 14.12.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Magick.NET-Q16-AnyCPU affected?
Yes, Magick.NET-Q16-AnyCPU is affected in releases prior to 14.12.0. Upgrade your dependency to 14.12.0 or later.
Is Magick.NET-Q16-HDRI-AnyCPU affected?
Yes, Magick.NET-Q16-HDRI-AnyCPU is affected in releases prior to 14.12.0. Upgrade your dependency to 14.12.0 or later.
What is the CVSS score of CVE-2026-40311?
CVE-2026-40311 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-40311?
CVE-2026-40311 is classified under CWE-693: Protection Mechanism Failure (The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.).
How can I check NuGet dependencies for CVE-2026-40311?
Run the dependency tree command: 'inspect dependencies for Magick.NET-Q16-AnyCPU'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-r83h-crwp-3vm7",
  "modified" : "2026-04-14T18:51:48Z",
  "published" : "2026-04-14T18:51:48Z",
  "aliases" : [ "CVE-2026-40311" ],
  "summary" : "ImageMagick has a heap-use-after-free via XMP profile could result in a crash when printing the values.",
  "details" : "An heap use after free when reading an invalid XMP profile could result in a crash due to an heap use after free when printing the values.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
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      "name" : "Magick.NET-Q16-AnyCPU"
    },
    "ranges" : [ {
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      }, {
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    },
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    "package" : {
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
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    },
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      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
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  }, {
    "package" : {
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    },
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-x64"
    },
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    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
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    },
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    },
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      "type" : "ECOSYSTEM",
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        "introduced" : "0"
      }, {
        "fixed" : "14.12.0"
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
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    },
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    "package" : {
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    },
    "ranges" : [ {
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      }, {
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      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-r83h-crwp-3vm7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-40311"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/commit/5facfecf1abb3fed46a08f614dcc43d1e548e20d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ImageMagick/ImageMagick"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416", "CWE-693" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T18:51:48Z",
    "nvd_published_at" : "2026-04-13T22:16:29Z"
  }
}