CVE-2026-46559

MEDIUM

ImageMagick: Heap Buffer Over-Write of a single byte in the JP2 encoder.

Published May 18, 2026Updated June 11, 2026Source: osv

Summary

An incorrect check in the JP2 will result in an heap buffer over-write of a single byte when specifying certain options.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Magick.NET-Q8-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q8-arm64 --version 14.13.1

NuGet

Update Magick.NET-Q16-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-x64 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.13.1

NuGet

Update Magick.NET-Q8-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q8-x64 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.13.1

NuGet

Update Magick.NET-Q16-x86 to 14.13.1 or later

dotnet add package Magick.NET-Q16-x86 --version 14.13.1

NuGet

Update Magick.NET-Q8-x86 to 14.13.1 or later

dotnet add package Magick.NET-Q8-x86 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.13.1

NuGet

Update Magick.NET-Q8-OpenMP-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.13.1

NuGet

Update Magick.NET-Q16-AnyCPU to 14.13.1 or later

dotnet add package Magick.NET-Q16-AnyCPU --version 14.13.1

NuGet

Update Magick.NET-Q8-AnyCPU to 14.13.1 or later

dotnet add package Magick.NET-Q8-AnyCPU --version 14.13.1

NuGet

Update Magick.NET-Q8-OpenMP-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.13.1

NuGet

Update Magick.NET-Q16-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-arm64 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-x86 to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-AnyCPU to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.13.1

NuGet

Update Magick.NET-Q16-OpenMP-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.13.1

NuGet

Update Magick.NET-Q16-OpenMP-x64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.13.1

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.13.1 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.13.1

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

Affected Packages (18)

Package	Ecosystem	Affected	Fixed In
Magick.NET-Q8-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1
Magick.NET-Q16-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+227 more)	14.13.1
Magick.NET-Q16-HDRI-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1
Magick.NET-Q8-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+227 more)	14.13.1
Magick.NET-Q16-HDRI-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+208 more)	14.13.1
Magick.NET-Q16-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+227 more)	14.13.1
Magick.NET-Q8-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+227 more)	14.13.1
Magick.NET-Q16-HDRI-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+108 more)	14.13.1
Magick.NET-Q8-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+108 more)	14.13.1
Magick.NET-Q16-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+211 more)	14.13.1
Magick.NET-Q8-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+211 more)	14.13.1
Magick.NET-Q8-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1
Magick.NET-Q16-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1
Magick.NET-Q16-HDRI-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+208 more)	14.13.1
Magick.NET-Q16-HDRI-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+208 more)	14.13.1
Magick.NET-Q16-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1
Magick.NET-Q16-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+108 more)	14.13.1
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+56 more)	14.13.1

Vulnerability Classification

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

CWE-193
View on MITRE
CWE-787
Out-of-bounds WriteMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 4.0 score means for each attack dimension.

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

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

References

Frequently Asked Questions

What is CVE-2026-46559?: ImageMagick: Heap Buffer Over-Write of a single byte in the JP2 encoder. This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 4.0/10).
How do I check if my project is affected by CVE-2026-46559?: CVE-2026-46559 affects Magick.NET-Q8-arm64, Magick.NET-Q16-x64 and Magick.NET-Q16-HDRI-arm64 (and 15 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-46559 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

4.0

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

Also Known As

GHSA-533m-3wf6-c33v

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