CVE-2026-106112 ImageSharp: ICC LUT16 output channel count can write beyond Vector4
A memory corruption vulnerability in ImageSharp allows attackers to cause denial of service or potentially execute code via malformed ICC profiles when color profile handling is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-106112?
CVE-2026-106112 is a high-severity memory corruption vulnerability in SixLabors ImageSharp, published on 6 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2026-106112?
2 open source packages ship an affected version, including SixLabors.ImageSharp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
SixLabors.ImageSharp NuGet | From 4.0.0 | 4.1.2 |
SixLabors.ImageSharp NuGet | From 4.0.0 | 4.1.2 |
Products include Sixlabors Imagesharp.
How do I fix CVE-2026-106112?
Upgrade SixLabors.ImageSharp to 4.1.2 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-106112 being exploited?
There is no known exploitation of CVE-2026-106112 in the wild and no public exploit code.
Other vulnerabilities in SixLabors ImageSharp
- CVE-2026-106110 ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
- CVE-2026-106113 ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
- CVE-2026-106115 ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
- CVE-2026-106117 ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp
- CVE-2025-27598 Out-of-bounds Write in SixLabors ImageSharp
Sources
Also known as GHSA-ffp7-56pq-64mr.