CVE-2026-106113 (GCVE-0-2026-106113)

Vulnerability from cvelistv5 – Published: 2026-10-06 17:47 – Updated: 2026-10-06 17:47
VLAI
Title
ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
SixLabors ImageSharp Affected: >= 2.0.0, < 4.1.2
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "ImageSharp",
          "vendor": "SixLabors",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 4.1.2"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u003cHalfVector4\u003e 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T17:47:17.503Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j3p4-wp97-rph4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j3p4-wp97-rph4"
        },
        {
          "name": "https://github.com/SixLabors/ImageSharp/pull/3187",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/SixLabors/ImageSharp/pull/3187"
        },
        {
          "name": "https://github.com/SixLabors/ImageSharp/commit/c4c4bf292298c026df470db1a17ff826515fd95d",
          "tags": [
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          ],
          "url": "https://github.com/SixLabors/ImageSharp/commit/c4c4bf292298c026df470db1a17ff826515fd95d"
        },
        {
          "name": "https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2"
        }
      ],
      "source": {
        "advisory": "GHSA-j3p4-wp97-rph4",
        "discovery": "UNKNOWN"
      },
      "title": "ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-106113",
    "datePublished": "2026-10-06T17:47:17.503Z",
    "dateReserved": "2026-10-06T15:33:55.333Z",
    "dateUpdated": "2026-10-06T17:47:17.503Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "ImageSharp",
                "vendor": "SixLabors",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 2.0.0, \u003c 4.1.2"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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\u003cHalfVector4\u003e 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."
          }
        ],
        "id": "CVE-2026-106113",
        "lastModified": "2026-10-06T20:03:40.690",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
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              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-06T18:16:52.953",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/SixLabors/ImageSharp/commit/c4c4bf292298c026df470db1a17ff826515fd95d"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/SixLabors/ImageSharp/pull/3187"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j3p4-wp97-rph4"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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