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ImageMagick: Policy Bypass in MNG coder could

Moderate severity GitHub Reviewed Published May 16, 2026 in ImageMagick/ImageMagick • Updated Jun 11, 2026

Package

nuget Magick.NET-Q16-AnyCPU (NuGet)

Affected versions

< 14.13.1

Patched versions

14.13.1
nuget Magick.NET-Q16-HDRI-AnyCPU (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-HDRI-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-HDRI-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-HDRI-x86 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-OpenMP-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-OpenMP-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q16-x86 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-AnyCPU (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-OpenMP-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-OpenMP-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-arm64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-x64 (NuGet)
< 14.13.1
14.13.1
nuget Magick.NET-Q8-x86 (NuGet)
< 14.13.1
14.13.1

Description

Because of a missing check in the MNG coder it would be possible to read more images than the list limit policy would allow resulting in excessive resource use.

References

@dlemstra dlemstra published to ImageMagick/ImageMagick May 16, 2026
Published to the GitHub Advisory Database May 18, 2026
Reviewed May 18, 2026
Published by the National Vulnerability Database Jun 10, 2026
Last updated Jun 11, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(13th percentile)

Weaknesses

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource. Learn more on MITRE.

Inefficient Algorithmic Complexity

An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. Learn more on MITRE.

Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. Learn more on MITRE.

CVE ID

CVE-2026-45664

GHSA ID

GHSA-g5mf-wqq5-vwg6

Source code

Credits

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