data/cve/v5/GO-2026-6303.json

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.0",
  "cveMetadata": {
    "cveId": "CVE-2026-56854"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc"
      },
      "title": "Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh",
      "descriptions": [
        {
          "lang": "en",
          "value": "The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback."
        }
      ],
      "affected": [
        {
          "vendor": "golang.org/x/crypto",
          "product": "golang.org/x/crypto/ssh",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "golang.org/x/crypto/ssh",
          "versions": [
            {
              "version": "0",
              "lessThan": "0.55.0",
              "status": "affected",
              "versionType": "semver"
            }
          ],
          "programRoutines": [
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-863: Incorrect Authorization"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://go.dev/issue/80213"
        },
        {
          "url": "https://go.dev/cl/797040"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6303"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Longwei Wang (@gn00295120)"
        }
      ]
    }
  }
}