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CVE-2026-106113— ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index

Quick assessment

Affected
SixLabors ImageSharp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageSharp 是一个 2D 图形库。从版本 2.0.0 至 4.1.2，若将攻击者提供的 32 位浮点 TIFF 图像解码为 ，并应用直方图均衡化（HistogramEqualization），可能导致 方法中计算出非有限值（如 NaN 或无穷大）或超出有效范围的亮度值。 方法会将该异常值用作未经检查的直方图偏移量，从而引发越界访问，导致进程终止。需要注意的是，自适应直方图均衡化（Adaptive Histogram Equalization）和自动电平调整（AutoLevel）不受此漏洞影响。该问题已在版

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
SixLabors ImageSharp >= 2.0.0, < 4.1.2 affected
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I. Basic Information for CVE-2026-106113

Vulnerability Information
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Vulnerability Title
ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SixLabors ImageSharp >= 2.0.0, < 4.1.2 -

II. Public POCs for CVE-2026-106113

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III. Intelligence Information for CVE-2026-106113

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Other References for CVE-2026-106113 (4)

Same Patch Batch · SixLabors · 2026-10-06 · 9 CVEs total

CVE-2026-106110 7.5 HIGH ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
CVE-2026-106115 7.5 HIGH ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
CVE-2026-106112 7.5 HIGH ImageSharp: ICC LUT16 output channel count can write beyond Vector4
CVE-2026-106117 7.5 HIGH ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows s
CVE-2026-106118 7.5 HIGH ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes sca
CVE-2026-106111 5.9 MEDIUM ImageSharp: EXR ZIP decoder can expose stale allocator data after a short inflate
CVE-2026-106114 5.3 MEDIUM ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions
CVE-2026-106116 5.3 MEDIUM ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop

IV. Related Vulnerabilities

Same product: ImageSharp
Same vendor: SixLabors
Same weakness: CWE-787

V. Comments for CVE-2026-106113

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