Magick.NET CVE-2026-46521
MEDIUM
Incorrect Calculation of Buffer Size (CWE-131)
GHSA-jcqp-6r6f-3mfx
5.5
CVSS 3.1
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CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Lifecycle Timeline
2
Source Code Evidence Fetched
May 18, 2026 - 21:33 vuln.today
Analysis Generated
May 18, 2026 - 21:33 vuln.today
DescriptionNVD
When using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check.
AnalysisAI
Heap buffer over-write in Magick.NET's MIFF encoder triggers an out-of-bounds write when LZMA compression is active, due to a missing buffer size check (CWE-131). All Magick.NET NuGet package variants prior to version 14.13.1 are affected across multiple architectures (AnyCPU, x64, x86, arm64) and depth configurations (Q16, Q16-HDRI, OpenMP). …
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External POC / Exploit Code
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