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CVE-2026-34238 — ImageMagick has an integer overflow in...

MEDIUM

ImageMagick has an integer overflow in despeckle operation causing a heap buffer overflow on 32-bit builds

Published April 13, 2026Updated May 5, 2026Source: osv

Summary

An integer overflow in the despeckle operation causes a heap buffer overflow on 32-bit builds that will result in an out of bounds write. ``` ==1551685==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xea2fb818 at pc 0x56cbc42a bp 0xffc4ce48 sp 0xffc4ce38 WRITE of size 8 at 0xea2fb818 thread T0 ```

Advisory Timeline

  • First published April 13, 2026 (182 days ago).
  • Last revised May 5, 2026 — 22 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update Magick.NET-Q16-HDRI-AnyCPU to 14.12.0 or later
dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0
NuGet
Update Magick.NET-Q16-HDRI-x86 to 14.12.0 or later
dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0
NuGet
Update Magick.NET-Q16-x86 to 14.12.0 or later
dotnet add package Magick.NET-Q16-x86 --version 14.12.0
NuGet
Update Magick.NET-Q16-AnyCPU to 14.12.0 or later
dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
NuGet
Update Magick.NET-Q8-AnyCPU to 14.12.0 or later
dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
NuGet
Update Magick.NET-Q8-x86 to 14.12.0 or later
dotnet add package Magick.NET-Q8-x86 --version 14.12.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Affects 1 ecosystem: nuget (6).

PackageEcosystemAffectedFixed In
Magick.NET-Q16-HDRI-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+206 more)14.12.0
Magick.NET-Q16-HDRI-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+206 more)14.12.0
Magick.NET-Q16-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+225 more)14.12.0
Magick.NET-Q16-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+209 more)14.12.0
Magick.NET-Q8-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+209 more)14.12.0
Magick.NET-Q8-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+225 more)14.12.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-190
    Integer OverflowMITRE
  • CWE-787
    Out-of-bounds WriteMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.1 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2026-34238?
ImageMagick has an integer overflow in despeckle operation causing a heap buffer overflow on 32-bit builds This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.1/10).
How do I check if my project is affected by CVE-2026-34238?
CVE-2026-34238 affects Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-x86 and Magick.NET-Q16-x86 (and 3 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-34238 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
5.1

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-26qp-ffjh-2x4v

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