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CVE-2026-40312
ImageMagick has an off-by-one error in MSL decoder could result in crash
Summary
ImageMagick has an off-by-one error in MSL decoder could result in crash
AI summary snake-internal / snake-template-v1
A weakness called CVE-2026-40312 was discovered in ImageMagick has an off-by-one.
Severity is Info. Low severity or not yet rated.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "ImageMagick has an off-by-one CVE-2026-40312".
CVE-2026-40312 (ImageMagick has an off-by-one). Severity: Info. Category: CWE-193.
Response plan:
1. Check the vendor advisory for affected versions and the patched release.
2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem
A weakness (CVE-2026-40312) in ImageMagick has an off-by-one. A serious software flaw has been identified.
📍 Affected scope
Target versions of ImageMagick has an off-by-one (see vendor advisory). If running in production, identify exposure immediately.
🔥 Severity
Severity: Info. Low severity or not yet rated.
🔧 How to fix
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-193)
🛡️ Workaround
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
🔍 Detection
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Affected packages
NuGet
Magick.NET-Q16-AnyCPU
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-HDRI-AnyCPU
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-HDRI-OpenMP-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-HDRI-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-HDRI-x64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-HDRI-x86
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-OpenMP-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-OpenMP-x64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-x64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q16-x86
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-AnyCPU
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-OpenMP-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-OpenMP-x64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-arm64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-x64
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
NuGet
Magick.NET-Q8-x86
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.12.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-40312
- package https://github.com/ImageMagick/ImageMagick
- web https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-5xg3-585r-9jh5
- web https://github.com/ImageMagick/ImageMagick/commit/2a06c7be3bba3326caf8b7a8d1fa2e0d4b88998d
- web https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19
- web https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0