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.
Published: 2026-10-06
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Wed, 07 Oct 2026 06:15:00 +0000

Type Values Removed Values Added
First Time appeared Sixlabors
Sixlabors imagesharp
Vendors & Products Sixlabors
Sixlabors imagesharp

Tue, 06 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Sixlabors Imagesharp
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T17:07:48.107Z

Reserved: 2026-10-06T15:33:55.333Z

Link: CVE-2026-106113

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-10-06T18:16:52.953

Modified: 2026-10-07T17:16:47.540

Link: CVE-2026-106113

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T06:00:08Z

Weaknesses