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CVE-2026-94447

Status: Awaiting AnalysisUnscored—

Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/toolchain go.sum entry and operates a malicious GOMODPROXY the user chooses to use can bypass the intended checksum. We now ensure that golang.org/toolchain always goes to the network for the canonical checksum.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Golang — GOAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-94447",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "security@golang.org",
      "affectedData": [
        {
          "vendor": "Go toolchain",
          "product": "cmd/go",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.26.9",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.27.0-0",
              "lessThan": "1.27.2",
              "versionType": "semver"
            }
          ],
          "packageName": "cmd/go",
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-08T23:17:05.180",
  "references": [
    {
      "url": "https://go.dev/cl/840785",
      "source": "security@golang.org"
    },
    {
      "url": "https://go.dev/issue/81834",
      "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-2026-6602",
      "source": "security@golang.org"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/toolchain go.sum entry and operates a malicious GOMODPROXY the user chooses to use can bypass the intended checksum. We now ensure that golang.org/toolchain always goes to the network for the canonical checksum."
    }
  ],
  "lastModified": "2026-10-09T16:35:35.900",
  "sourceIdentifier": "security@golang.org"
}