CVE-2026-61866

LOW

ImageMagick: Memory Leak in JNG encoder when a blob could not be opened

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

Summary

When a blob can not be opened a memory leak will occur when encoding a JNG file.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Magick.NET-Q16-OpenMP-x64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.15.0

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-OpenMP-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-OpenMP-arm64 --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-Q8-OpenMP-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.15.0

NuGet

Update Magick.NET-Q16-HDRI-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-HDRI-arm64 --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-Q8-OpenMP-x64 to 14.15.0 or later

dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.15.0

NuGet

Update Magick.NET-Q8-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q8-arm64 --version 14.15.0

NuGet

Update Magick.NET-Q16-x64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-x64 --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-HDRI-x64 to 14.15.0 or later

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

NuGet

Update Magick.NET-Q16-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-arm64 --version 14.15.0

NuGet

Update Magick.NET-Q8-x64 to 14.15.0 or later

dotnet add package Magick.NET-Q8-x64 --version 14.15.0

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.15.0 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.15.0

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

Affected Packages (17)

Package	Ecosystem	Affected	Fixed In
Magick.NET-Q16-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+110 more)	14.15.0
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-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 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-Q8-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 more)	14.15.0
Magick.NET-Q16-HDRI-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 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-Q8-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+110 more)	14.15.0
Magick.NET-Q8-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 more)	14.15.0
Magick.NET-Q16-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+229 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-HDRI-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+210 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
Magick.NET-Q16-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 more)	14.15.0
Magick.NET-Q8-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+229 more)	14.15.0
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+58 more)	14.15.0

Vulnerability Classification

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

CWE-401
Memory LeakMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 2.9 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

Low

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

References

Frequently Asked Questions

What is CVE-2026-61866?: ImageMagick: Memory Leak in JNG encoder when a blob could not be opened This vulnerability has been assigned a severity rating of LOW (CVSS score: 2.9/10).
How do I check if my project is affected by CVE-2026-61866?: CVE-2026-61866 affects Magick.NET-Q16-OpenMP-x64, Magick.NET-Q8-x86 and Magick.NET-Q16-OpenMP-arm64 (and 14 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-61866 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

2.9

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

Also Known As

GHSA-99w9-hv66-rfv7

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