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  4. CVE 2026 106113 imagesharp histogramequalization uses an
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Back to active CVEs
High · CVSS 7.5CVE-2026-106113

ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram indexCVE-2026-106113

Answer in brief

CVE-2026-106113 records a High severity (CVSS 7.5) vulnerability in ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index. The current sources do not mark it as known exploited. The current feed maps SixLabors/ImageSharp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SixLabors/ImageSharp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
SixLabors/ImageSharpgeneric>=2.0.0 <4.1.24.1.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for SixLabors/ImageSharp.
  2. 2Review the reported fix. Update SixLabors/ImageSharp to 4.1.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensionsSame sixlabors/imagesharp package
  • ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output bufferSame sixlabors/imagesharp package
  • ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loopSame sixlabors/imagesharp package
  • ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharpSame sixlabors/imagesharp package
  • ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes scanlines of ImageWidth — heap OOB writeSame sixlabors/imagesharp package
  • CISA ADP VulnrichmentSame generic ecosystem

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Oct 6, 2026
References
4 linked sources
Open source record