SixLabors ImageSharp up to 4.1.1 HistogramEqualization GrayscaleLevelsRowOperation.Invoke memory corruption

Summaryinfo

A vulnerability has been found in SixLabors ImageSharp up to 4.1.1 and classified as problematic. Impacted is the function GrayscaleLevelsRowOperation.Invoke of the component HistogramEqualization. Performing a manipulation results in memory corruption. This vulnerability is known as CVE-2026-106113. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in SixLabors ImageSharp up to 4.1.1. It has been classified as problematic. This affects the function GrayscaleLevelsRowOperation.Invoke of the component HistogramEqualization. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. The summary by CVE is:

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, decoding an attacker-supplied 32-bit floating-point TIFF as Image<HalfVector4> and applying HistogramEqualization can produce a non-finite or out-of-range luminance in ColorNumerics.GetBT709Luminance. GrayscaleLevelsRowOperation.Invoke uses the resulting value as an unchecked histogram offset, causing an unsafe out-of-range access and process termination. Adaptive Histogram Equalization and AutoLevel are not affected by this report. This issue is fixed in version 4.1.2.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-106113 since 10/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-93554). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• SixLabors

Name

• ImageSharp

Version

• 4.1.0
• 4.1.1

Website

• Product: https://github.com/SixLabors/ImageSharp/

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