CVE-2026-78667 (GCVE-0-2026-78667)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-08 22:53
VLAI
Title
Lack of limit on size of parsed Range headers in net/http
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.
Severity
No CVSS data available.
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
Go CNA under the Google root
CNA scorecard E 42/100 over 75 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Go standard library net/http Affected: 0 , < 1.26.9 (semver)
Affected: 1.27.0-0 , < 1.27.2 (semver)
guessed Create a notification for this product.
Credits
Jakub Ciolek (https://ciolek.dev)
Show details on NVD website
To clipboard 

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            },
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            },
            {
              "name": "ServeFile"
            },
            {
              "name": "ServeFileFS"
            },
            {
              "name": "fileHandler.ServeHTTP"
            },
            {
              "name": "fileTransport.RoundTrip"
            }
          ],
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              "version": "0",
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          "value": "Jakub Ciolek (https://ciolek.dev)"
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            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T22:53:59.148Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/847309"
        },
        {
          "url": "https://go.dev/issue/81858"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6609"
        }
      ],
      "title": "Lack of limit on size of parsed Range headers in net/http"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Go",
    "cveId": "CVE-2026-78667",
    "datePublished": "2026-10-08T22:53:59.148Z",
    "dateReserved": "2026-08-24T23:36:15.738Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "defaultStatus": "unaffected",
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                "programRoutines": [
                  {
                    "name": "parseRange"
                  },
                  {
                    "name": "ServeContent"
                  },
                  {
                    "name": "ServeFile"
                  },
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                    "versionType": "semver"
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        "descriptions": [
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        ],
        "id": "CVE-2026-78667",
        "lastModified": "2026-10-08T23:17:03.880",
        "metrics": {},
        "published": "2026-10-08T23:17:03.880",
        "references": [
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      "current_release_date": "2026-10-09T11:44:14+00:00",
      "cve": "CVE-2026-78667",
      "id": "CVE-2026-78667",
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      "product_status:known_affected": "330",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "net/http: golang: golang: Denial of Service via crafted HTTP Range headers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78667.json",
      "version": "3"
    }
  }
}



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