What’s Vulnerable › Vulnerabilities

CVE-2026-106112: ImageSharp: ICC LUT16 output channel count can write beyond Vector4

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-06 · updated 2026-10-24
• Weakness: CWE-787

Description

ImageSharp is a 2D graphics library. From 4.0.0 until 4.1.2, ICC LUT16 conversion accepts more than four output channels even though ClutCalculator.Calculate and LutEntryCalculator.CalculateLut store intermediate and output values in Vector4. When DecoderOptions.ColorProfileHandling is set to Convert, a malformed embedded profile can direct interpolation and output-LUT operations to write one float per declared channel beyond the four-float destination. This can corrupt memory and terminate the process; the default Preserve mode does not run ICC conversion. This issue is fixed in version 4.1.2.

Affected products

• SixLabors ImageSharp: from 4.0.0 before 4.1.2 — fixed in 4.1.2

How to fix

Upgrade to a fixed version: SixLabors ImageSharp 4.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/SixLabors/ImageSharp/commit/b03f0ed7e5be760eecc740fa53dd166b18ae9b23
• https://github.com/SixLabors/ImageSharp/pull/3187
• https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
• https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr
• https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr

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