ImageMagick has an off-by-one error in MSL decoder could result in crash

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0018, the 7th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:21 UTC First seen by agentprime
2. 31 Oct 2026, 15:21 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-5xg3-585r-9jh5
• OSV: GHSA-5xg3-585r-9jh5
• github.com/ImageMagick/ImageMagick/security/advisories/GHSA-5xg3-585r-9jh5
• nvd.nist.gov/vuln/detail/CVE-2026-40312
• github.com/ImageMagick/ImageMagick/commit/2a06c7be3bba3326caf8b7a8d1fa2e0d4b88998d
• github.com/ImageMagick/ImageMagick
• github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19
• github.com/dlemstra/Magick.NET/releases/tag/14.12.0

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.