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ImageMagick CVE-2026-46520

HIGH
Heap-based Buffer Overflow (CWE-122)
2026-05-18 https://github.com/ImageMagick/ImageMagick GHSA-36wm-hprc-mcf5
Buffer Overflow Heap Overflow
7.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Source Code Evidence Fetched
May 18, 2026 - 21:31 vuln.today
Analysis Generated
May 18, 2026 - 21:31 vuln.today

DescriptionNVD

When reading multiple images with different dimensions an out of bounds heap write can occur.

AnalysisAI

Heap-based buffer over-write in ImageMagick's IPL decoder (exposed through Magick.NET bindings) can be triggered when the library reads a multi-image stream whose frames have differing dimensions, leading to memory corruption and process crash. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/C:N/I:N/A:H) signals an availability-only impact reachable without authentication, and no public exploit identified at time of analysis. …

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RemediationAI

Within 24 hours: Inventory all systems using ImageMagick or Magick.NET (identify both standalone instances and Magick.NET bindings in .NET applications). Within 7 days: Implement input validation to reject multi-frame image formats (IPL, GIF with multiple frames) or enforce uniform frame dimensions before processing; deploy image-processing services in containers with memory limits and auto-restart capabilities. …

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CVE-2026-46520 vulnerability details – vuln.today
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