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CVE-2026-106114— ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions

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 是一个二维图形库。在版本 1.0.0-beta0001 到 4.1.2 之间，ICC CLUT（色彩查找表）解析过程在确认配置文件中包含所声明的值之前，会依据攻击者可声明的通道数和网格维度来计算分配大小。IccDataReader.ReadClutF32 可能请求一个大尺寸的浮点数数组，而早期的公共 IccProfile.Entries 解析路径可能从被截断的短配置文件中分配一个大尺寸的锯齿状（jagged）数组结构。 在版本 4 中，当 DecoderOptions.ColorProfile

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
SixLabors ImageSharp >= 1.0.0-beta0001, < 4.1.2 affected
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I. Basic Information for CVE-2026-106114

Vulnerability Information
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Vulnerability Title
ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions
Source: CVE Program / CVE List V5
Vulnerability Description
ImageSharp is a 2D graphics library. From 1.0.0-beta0001 until 4.1.2, ICC CLUT parsing calculates allocation sizes from attacker-declared channel and grid dimensions before confirming that the profile contains the declared values. IccDataReader.ReadClutF32 can request a large float array, and earlier public IccProfile.Entries parsing paths can allocate a large jagged representation, from a short truncated profile. In version 4, automatic image conversion reaches the parser when DecoderOptions.ColorProfileHandling is Convert; the default Preserve mode avoids that conversion path. The demonstrated impact is memory pressure and input-validation failure, not unhandled process termination. 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:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SixLabors ImageSharp >= 1.0.0-beta0001, < 4.1.2 -

II. Public POCs for CVE-2026-106114

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III. Intelligence Information for CVE-2026-106114

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Other References for CVE-2026-106114 (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-2026-106113 7.5 HIGH ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram
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-2026-106116 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-789

V. Comments for CVE-2026-106114

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