CVE-2026-56362

LOW

ImageMagick: Heap-based Buffer Overflow in GetPixelIndex due to metadata-cache desynchronization

Published February 25, 2026Updated July 9, 2026Source: osv

Summary

`OpenPixelCache` updates image channel metadata **before** attempting pixel cache memory allocation. When both memory and disk allocation fail a heap-buffer-overflow read in occurs in any writer that calls `GetPixelIndex`.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Magick.NET-Q8-x86 to 14.10.3 or later

dotnet add package Magick.NET-Q8-x86 --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-AnyCPU to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.10.3

NuGet

Update Magick.NET-Q16-OpenMP-x86 to 14.10.3 or later

dotnet add package Magick.NET-Q16-OpenMP-x86 --version 14.10.3

NuGet

Update Magick.NET-Q16-x86 to 14.10.3 or later

dotnet add package Magick.NET-Q16-x86 --version 14.10.3

NuGet

Update Magick.NET-Q8-OpenMP-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.10.3

NuGet

Update Magick.NET-Q16-AnyCPU to 14.10.3 or later

dotnet add package Magick.NET-Q16-AnyCPU --version 14.10.3

NuGet

Update Magick.NET-Q8-AnyCPU to 14.10.3 or later

dotnet add package Magick.NET-Q8-AnyCPU --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-x86 to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.10.3

NuGet

Update Magick.NET-Q16-OpenMP-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.10.3

NuGet

Update Magick.NET-Q16-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-x64 --version 14.10.3

NuGet

Update Magick.NET-Q16-OpenMP-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.10.3

NuGet

Update Magick.NET-Q16-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-arm64 --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.10.3

NuGet

Update Magick.NET-Q8-OpenMP-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.10.3

NuGet

Update Magick.NET-Q8-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q8-arm64 --version 14.10.3

NuGet

Update Magick.NET-Q8-x64 to 14.10.3 or later

dotnet add package Magick.NET-Q8-x64 --version 14.10.3

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.10.3 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.10.3

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

Affected Packages (19)

Package	Ecosystem	Affected	Fixed In
Magick.NET-Q8-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+221 more)	14.10.3
Magick.NET-Q16-HDRI-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+202 more)	14.10.3
Magick.NET-Q16-HDRI-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3
Magick.NET-Q16-HDRI-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+202 more)	14.10.3
Magick.NET-Q16-OpenMP-x86	nuget	All versions	14.10.3
Magick.NET-Q16-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+221 more)	14.10.3
Magick.NET-Q8-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3
Magick.NET-Q16-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+205 more)	14.10.3
Magick.NET-Q8-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+205 more)	14.10.3
Magick.NET-Q16-HDRI-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+202 more)	14.10.3
Magick.NET-Q16-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3
Magick.NET-Q16-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+221 more)	14.10.3
Magick.NET-Q16-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+102 more)	14.10.3
Magick.NET-Q16-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3
Magick.NET-Q16-HDRI-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+102 more)	14.10.3
Magick.NET-Q8-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+102 more)	14.10.3
Magick.NET-Q8-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3
Magick.NET-Q8-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+221 more)	14.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+50 more)	14.10.3

Vulnerability Classification

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

CWE-122
View on MITRE
CWE-125
Out-of-bounds ReadMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 3.3 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

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

References

Frequently Asked Questions

What is CVE-2026-56362?: ImageMagick: Heap-based Buffer Overflow in GetPixelIndex due to metadata-cache desynchronization This vulnerability has been assigned a severity rating of LOW (CVSS score: 3.3/10).
How do I check if my project is affected by CVE-2026-56362?: CVE-2026-56362 affects Magick.NET-Q8-x86, Magick.NET-Q16-HDRI-x64 and Magick.NET-Q16-HDRI-arm64 (and 16 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-56362 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

3.3

Exploitation is difficult or impact is minor. Address in your next planned update.

Also Known As

GHSA-gq5v-qf8q-fp77

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