FKIE_CVE-2026-78667

Vulnerability from fkie_nvd - Published: 2026-10-08 23:17 - Updated: 2026-10-08 23:17
Severity
Summary
When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.
References
security@golang.orghttps://go.dev/cl/847309
security@golang.orghttps://go.dev/issue/81858
security@golang.orghttps://groups.google.com/g/golang-announce/c/U2fTuyDJznI
security@golang.orghttps://pkg.go.dev/vuln/GO-2026-6609
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http",
          "product": "net/http",
          "programRoutines": [
            {
              "name": "parseRange"
            },
            {
              "name": "ServeContent"
            },
            {
              "name": "ServeFile"
            },
            {
              "name": "ServeFileFS"
            },
            {
              "name": "fileHandler.ServeHTTP"
            },
            {
              "name": "fileTransport.RoundTrip"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.2",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@golang.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU."
    }
  ],
  "id": "CVE-2026-78667",
  "lastModified": "2026-10-08T23:17:03.880",
  "metrics": {},
  "published": "2026-10-08T23:17:03.880",
  "references": [
    {
      "source": "security@golang.org",
      "url": "https://go.dev/cl/847309"
    },
    {
      "source": "security@golang.org",
      "url": "https://go.dev/issue/81858"
    },
    {
      "source": "security@golang.org",
      "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
    },
    {
      "source": "security@golang.org",
      "url": "https://pkg.go.dev/vuln/GO-2026-6609"
    }
  ],
  "sourceIdentifier": "security@golang.org",
  "vulnStatus": "Received"
}



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