High severity · published Oct 6, 2026
CVE-2026-106113
ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IM
ImageSharp · SixLabors
>= 2.0.0, < 4.1.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106113
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-106113
x_refsource_CONFIRM
https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j3p4-wp97-rph4
x_refsource_MISC
https://github.com/SixLabors/ImageSharp/pull/3187
x_refsource_MISC
https://github.com/SixLabors/ImageSharp/commit/c4c4bf292298c026df470db1a17ff826515fd95d
x_refsource_MISC
https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
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