CVE-2026-56366 — ImageMagick: META reader memory leak in...

LOW

ImageMagick: META reader memory leak in the APP1JPEG input path

Published March 26, 2026Updated July 11, 2026Source: osv

Summary

ImageMagick contains a memory leak in the META reader when processing the `APP1JPEG` input path.

Advisory Timeline

First published March 26, 2026 (199 days ago).
Last revised July 11, 2026 — 106 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Magick.NET-Q8-x86 to 14.11.1 or later

dotnet add package Magick.NET-Q8-x86 --version 14.11.1

NuGet

Update Magick.NET-Q16-HDRI-AnyCPU to 14.11.1 or later

dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.11.1

NuGet

Update Magick.NET-Q8-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q8-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q8-x64 to 14.11.1 or later

dotnet add package Magick.NET-Q8-x64 --version 14.11.1

NuGet

Update Magick.NET-Q16-x86 to 14.11.1 or later

dotnet add package Magick.NET-Q16-x86 --version 14.11.1

NuGet

Update Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q16-OpenMP-x64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.11.1

NuGet

Update Magick.NET-Q16-OpenMP-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q16-AnyCPU to 14.11.1 or later

dotnet add package Magick.NET-Q16-AnyCPU --version 14.11.1

NuGet

Update Magick.NET-Q16-HDRI-x64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.11.1

NuGet

Update Magick.NET-Q16-x64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-x64 --version 14.11.1

NuGet

Update Magick.NET-Q16-HDRI-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q16-HDRI-x86 to 14.11.1 or later

dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.11.1

NuGet

Update Magick.NET-Q16-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q16-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q16-OpenMP-x86 to 14.11.1 or later

dotnet add package Magick.NET-Q16-OpenMP-x86 --version 14.11.1

NuGet

Update Magick.NET-Q8-OpenMP-x64 to 14.11.1 or later

dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.11.1

NuGet

Update Magick.NET-Q8-OpenMP-arm64 to 14.11.1 or later

dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.11.1

NuGet

Update Magick.NET-Q8-AnyCPU to 14.11.1 or later

dotnet add package Magick.NET-Q8-AnyCPU --version 14.11.1

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

Affected Packages (18)

Affects 1 ecosystem: nuget (18).

Package	Ecosystem	Affected	Fixed In
Magick.NET-Q8-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+224 more)	14.11.1
Magick.NET-Q16-HDRI-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+205 more)	14.11.1
Magick.NET-Q8-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q8-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+224 more)	14.11.1
Magick.NET-Q16-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+224 more)	14.11.1
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q16-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+105 more)	14.11.1
Magick.NET-Q16-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q16-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+208 more)	14.11.1
Magick.NET-Q16-HDRI-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+205 more)	14.11.1
Magick.NET-Q16-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+224 more)	14.11.1
Magick.NET-Q16-HDRI-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q16-HDRI-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+205 more)	14.11.1
Magick.NET-Q16-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q16-OpenMP-x86	nuget	All versions	14.11.1
Magick.NET-Q8-OpenMP-x64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+105 more)	14.11.1
Magick.NET-Q8-OpenMP-arm64	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+53 more)	14.11.1
Magick.NET-Q8-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+208 more)	14.11.1

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) 3.3 score means for each attack dimension.

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

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

References

Frequently Asked Questions

What is CVE-2026-56366?: ImageMagick: META reader memory leak in the APP1JPEG input path 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-2026-56366?: CVE-2026-56366 affects Magick.NET-Q8-x86, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q8-arm64 (and 15 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-56366 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-9r56-3gjq-hqf7

Related CVEs

CVE-2026-25965
HIGH
ImageMagick: Policy bypass through path traversal allows reading restricted content despite secured policy
CVE-2026-25987
MEDIUM
ImageMagick has a heap buffer over-read in its MAP image decoder
CVE-2026-53465
MEDIUM
ImageMagick has a Heap Buffer Over-Write in SF3 encoder when writing multi-frame image
CVE-2026-53467
MEDIUM
ImageMagick: Information Disclosure in MNG decoder because allocated memory is left unchanged
CVE-2026-26283
MEDIUM
ImageMagick has a possible infinite loop in its JPEG encoder when using `jpeg:extent`
CVE-2026-53463
MEDIUM
ImageMagick has Null Pointer Dereference caused by the distort operation when passing incorrect arguments
CVE-2026-56362
LOW
ImageMagick: Heap-based Buffer Overflow in GetPixelIndex due to metadata-cache desynchronization
CVE-2026-56363
LOW
ImageMagick: Division by Zero in binomial kernel

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies