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GeekWala

CVE-2026-62946

MEDIUM

ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds

Published July 24, 2026Updated July 24, 2026Source: osv

Summary

When processing an extremely large JNX file on 32-bit platforms an integer overflow will happen that can cause a heap buffer over-write.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update Magick.NET-Q8-x86 to 14.15.0 or later
dotnet add package Magick.NET-Q8-x86 --version 14.15.0
NuGet
Update Magick.NET-Q16-HDRI-AnyCPU to 14.15.0 or later
dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.15.0
NuGet
Update Magick.NET-Q16-HDRI-x86 to 14.15.0 or later
dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.15.0
NuGet
Update Magick.NET-Q16-x86 to 14.15.0 or later
dotnet add package Magick.NET-Q16-x86 --version 14.15.0
NuGet
Update Magick.NET-Q8-AnyCPU to 14.15.0 or later
dotnet add package Magick.NET-Q8-AnyCPU --version 14.15.0
NuGet
Update Magick.NET-Q16-AnyCPU to 14.15.0 or later
dotnet add package Magick.NET-Q16-AnyCPU --version 14.15.0

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

Affected Packages (6)

PackageEcosystemAffectedFixed In
Magick.NET-Q8-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+229 more)14.15.0
Magick.NET-Q16-HDRI-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+210 more)14.15.0
Magick.NET-Q16-HDRI-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+210 more)14.15.0
Magick.NET-Q16-x86
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+229 more)14.15.0
Magick.NET-Q8-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+213 more)14.15.0
Magick.NET-Q16-AnyCPU
nuget
10.0.0, 10.1.0, 11.0.0, 11.1.0 (+213 more)14.15.0

Vulnerability Classification

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

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-2026-62946?
ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files 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-2026-62946?
CVE-2026-62946 affects Magick.NET-Q8-x86, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q16-HDRI-x86 (and 3 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-62946 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-h22j-f9xw-xjjm

Related CVEs

  • CVE-2025-55154
    HIGH

    imagemagick: integer overflows in MNG magnification

  • CVE-2026-33901
    HIGH

    ImageMagick has a heap Buffer Overflow in ImageMagick MVG decoder

  • CVE-2026-23952
    MEDIUM

    ImageMagick has a NULL pointer dereference in MSL parser via <comment> tag before image load

  • CVE-2026-40312
    MEDIUM

    ImageMagick has an off-by-one error in MSL decoder could result in crash

  • CVE-2026-55597
    MEDIUM

    ImageMagick: Heap Buffer Over-Write in JP2 encoder when due to incorrect handling of arguments

  • CVE-2023-1289
    MEDIUM

    ImageMagick: Specially crafted SVG leads to segmentation fault and generate trash files in "/tmp", possible to leverage DoS

  • CVE-2026-56364
    MEDIUM

    ImageMagick has a Memory Leak in LoadOpenCLDeviceBenchmark() when parsing malformed XML

  • CVE-2025-53019
    LOW

    ImageMagick has a Memory Leak in magick stream

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