CVE-2026-30931: Magick.NET Q16 AnyCPU ImageMagick Has Heap-based Buffer Overflow Vulnerability

MODERATE
Advisory Identifier: GHSA-h95r-c8c7-mrwx
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CVSS 6.8
CWE-122
Published
Advisory Summary

CVE-2026-30931 is a MODERATE (CVSS 6.8) imagemagick has heap-based buffer overflow vulnerability (CWE-122: Heap-based Buffer Overflow) affecting Magick.NET Q16 AnyCPU libraries in the NuGet ecosystem. The issue involves imagemagick has heap-based buffer overflow in uhdr encoder. Remediation is available by upgrading affected packages to version 14.10.4.

CVE-2026-30931 at a Glance

CVE Identifier CVE-2026-30931
GHSA Identifier GHSA-h95r-c8c7-mrwx
Severity MODERATE
CVSS v3.1 Base Score 6.8
CWE Classification CWE-122: Heap-based Buffer Overflow
Affected Product Magick.NET Q16 AnyCPU
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 6.8

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:N/S:U/C:N/I:L/A:H).

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

How to Fix CVE-2026-30931

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: 14.10.4 
Upgrade Magick.NET-Q16-AnyCPU to 14.10.4
Magick.NET-Q16-HDRI-AnyCPU fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-AnyCPU to 14.10.4
Magick.NET-Q16-HDRI-OpenMP-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.10.4
Magick.NET-Q16-HDRI-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-arm64 to 14.10.4
Magick.NET-Q16-HDRI-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-x64 to 14.10.4
Magick.NET-Q16-HDRI-x86 fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-x86 to 14.10.4
Magick.NET-Q16-OpenMP-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-OpenMP-arm64 to 14.10.4
Magick.NET-Q16-OpenMP-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-OpenMP-x64 to 14.10.4
Magick.NET-Q16-OpenMP-x86 fixed: 14.10.4 
Upgrade Magick.NET-Q16-OpenMP-x86 to 14.10.4
Magick.NET-Q16-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-arm64 to 14.10.4
Magick.NET-Q16-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-x64 to 14.10.4
Magick.NET-Q16-x86 fixed: 14.10.4 
Upgrade Magick.NET-Q16-x86 to 14.10.4
Magick.NET-Q16-HDRI-OpenMP-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q16-HDRI-OpenMP-x64 to 14.10.4
Magick.NET-Q8-AnyCPU fixed: 14.10.4 
Upgrade Magick.NET-Q8-AnyCPU to 14.10.4
Magick.NET-Q8-OpenMP-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q8-OpenMP-arm64 to 14.10.4
Magick.NET-Q8-OpenMP-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q8-OpenMP-x64 to 14.10.4
Magick.NET-Q8-arm64 fixed: 14.10.4 
Upgrade Magick.NET-Q8-arm64 to 14.10.4
Magick.NET-Q8-x64 fixed: 14.10.4 
Upgrade Magick.NET-Q8-x64 to 14.10.4
Magick.NET-Q8-x86 fixed: 14.10.4 
Upgrade Magick.NET-Q8-x86 to 14.10.4
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-2026-30931, 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 14.10.4), 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-122: Heap-based Buffer Overflow, where a heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). 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

A heap-based buffer overflow in the UHDR encoder can happen due to truncation of a value and it would allow an out of bounds write. ``` ================================================================ ==2158399==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x521000039500 at pc 0x562a4a42f968 bp 0x7ffcca4ed6c0 sp 0x7ffcca4ed6b0 WRITE of size 1 at 0x521000039500 thread T0 ```

CVE-2026-30931 Affected Magick.NET Q16 AnyCPU Versions

19 component(s)
Fixed Versions:
14.10.4
Product / Package Ecosystem Affected Versions Fixed Version
Magick.NET-Q16-AnyCPU
nuget/Magick.NET-Q16-AnyCPU
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-AnyCPU
nuget/Magick.NET-Q16-HDRI-AnyCPU
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-OpenMP-arm64
nuget/Magick.NET-Q16-HDRI-OpenMP-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-arm64
nuget/Magick.NET-Q16-HDRI-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-x64
nuget/Magick.NET-Q16-HDRI-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-x86
nuget/Magick.NET-Q16-HDRI-x86
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-OpenMP-arm64
nuget/Magick.NET-Q16-OpenMP-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-OpenMP-x64
nuget/Magick.NET-Q16-OpenMP-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-OpenMP-x86
nuget/Magick.NET-Q16-OpenMP-x86
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-arm64
nuget/Magick.NET-Q16-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-x64
nuget/Magick.NET-Q16-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-x86
nuget/Magick.NET-Q16-x86
NuGet
< 14.10.4
14.10.4
Magick.NET-Q16-HDRI-OpenMP-x64
nuget/Magick.NET-Q16-HDRI-OpenMP-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-AnyCPU
nuget/Magick.NET-Q8-AnyCPU
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-OpenMP-arm64
nuget/Magick.NET-Q8-OpenMP-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-OpenMP-x64
nuget/Magick.NET-Q8-OpenMP-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-arm64
nuget/Magick.NET-Q8-arm64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-x64
nuget/Magick.NET-Q8-x64
NuGet
< 14.10.4
14.10.4
Magick.NET-Q8-x86
nuget/Magick.NET-Q8-x86
NuGet
< 14.10.4
14.10.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-h95r-c8c7-mrwx
NVD — CVE-2026-30931 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30931
Magick.NET Q16 AnyCPU Source Repository REPOSITORY
https://github.com/ImageMagick/ImageMagick
Magick.NET Q16 AnyCPU Release RELEASE
https://github.com/dlemstra/Magick.NET/releases/tag/14.10.4

Frequently Asked Questions

What is CVE-2026-30931?
CVE-2026-30931 is a security vulnerability in Magick.NET Q16 AnyCPU involving ImageMagick has heap-based buffer overflow in UHDR encoder under CWE-122: Heap-based Buffer Overflow.
Which Magick.NET Q16 AnyCPU versions are affected?
Affected versions include releases prior to 14.10.4 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-OpenMP-x86, Magick.NET-Q16-arm64, Magick.NET-Q16-x64, Magick.NET-Q16-x86, Magick.NET-Q16-HDRI-OpenMP-x64, Magick.NET-Q8-AnyCPU, Magick.NET-Q8-OpenMP-arm64, Magick.NET-Q8-OpenMP-x64, Magick.NET-Q8-arm64, Magick.NET-Q8-x64, Magick.NET-Q8-x86.
What version fixes CVE-2026-30931?
Upgrading to 14.10.4 (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 14.10.4. Upgrade your dependency to 14.10.4 or later.
Is Magick.NET-Q16-HDRI-AnyCPU affected?
Yes, Magick.NET-Q16-HDRI-AnyCPU is affected in releases prior to 14.10.4. Upgrade your dependency to 14.10.4 or later.
What is the CVSS score of CVE-2026-30931?
CVE-2026-30931 has a CVSS v3.1 base score of 6.8 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.
What CWE is associated with CVE-2026-30931?
CVE-2026-30931 is classified under CWE-122: Heap-based Buffer Overflow (A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().).
How can I check NuGet dependencies for CVE-2026-30931?
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-h95r-c8c7-mrwx",
  "modified" : "2026-03-12T14:15:44Z",
  "published" : "2026-03-12T14:15:44Z",
  "aliases" : [ "CVE-2026-30931" ],
  "summary" : "ImageMagick has heap-based buffer overflow in UHDR encoder",
  "details" : "A heap-based buffer overflow in the UHDR encoder can happen due to truncation of a value and it would allow an out of bounds write.\n\n```\n================================================================\n==2158399==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x521000039500 at pc 0x562a4a42f968 bp 0x7ffcca4ed6c0 sp 0x7ffcca4ed6b0\nWRITE of size 1 at 0x521000039500 thread T0\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-AnyCPU"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-AnyCPU"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-OpenMP-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-HDRI-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-OpenMP-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-OpenMP-x64"
    },
    "ranges" : [ {
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      "events" : [ {
        "introduced" : "0"
      }, {
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-OpenMP-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
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  }, {
    "package" : {
      "ecosystem" : "NuGet",
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-AnyCPU"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-OpenMP-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
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        "introduced" : "0"
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        "fixed" : "14.10.4"
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    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-OpenMP-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-h95r-c8c7-mrwx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30931"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ImageMagick/ImageMagick"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dlemstra/Magick.NET/releases/tag/14.10.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-122" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-12T14:15:44Z",
    "nvd_published_at" : "2026-03-10T07:44:57Z"
  }
}