data/osv/GO-2026-6180.json

{
  "schema_version": "1.3.1",
  "id": "GO-2026-6180",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2026-56864"
  ],
  "summary": "Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb",
  "details": "A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log.\n\nThis attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log.\n\nIn order to determine if you have been affected:\n\nrm -r go.sum go.work.sum vendor/ \u0026\u0026 go mod tidy",
  "affected": [
    {
      "package": {
        "name": "toolchain",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.25.13"
            },
            {
              "introduced": "1.26.0-0"
            },
            {
              "fixed": "1.26.6"
            },
            {
              "introduced": "1.27.0-0"
            },
            {
              "fixed": "1.27.0-rc.3"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "cmd/go"
          }
        ]
      }
    },
    {
      "package": {
        "name": "golang.org/x/mod",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.40.0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "golang.org/x/mod/sumdb",
            "symbols": [
              "Client.Lookup"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/80745"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
    },
    {
      "type": "FIX",
      "url": "https://go.dev/cl/815000"
    },
    {
      "type": "FIX",
      "url": "https://go.dev/cl/815020"
    }
  ],
  "credits": [
    {
      "name": "mundur"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2026-6180",
    "review_status": "REVIEWED"
  }
}