Security advisory

{
  "id": "5e0484ee5120f6ef3cdc9dfbbf3d22479af1d9db1efbed85bb8dc49484a78416",
  "url": "https://osv.dev/vulnerability/CVE-2021-27400",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-27400",
    "summary": "HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1",
    "evidence": "osv:CVE-2021-27400",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-27400",
      "aliases": [
        "BIT-vault-2021-27400",
        "CVE-2021-27400"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hashicorp/vault",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a10df31ee51d18d8dc4a3eda8b6ffd9097b21ba5"
                },
                {
                  "introduced": "4e222b85c40a810b74400ee3c54449479e32bb9f"
                },
                {
                  "fixed": "917142287996a005cb1ed9d96d00d06a0590e44e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "1.7.0"
                      },
                      {
                        "fixed": "1.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "1.7.0"
                      },
                      {
                        "fixed": "1.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "sdk/v0.2.0",
            "api/v1.1.0",
            "v1.7.0",
            "v1.6.3",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.6.0-rc",
            "v1.2.0",
            "v1.2.0-rc1",
            "api/v1.0.4",
            "sdk/v0.1.13",
            "api/v1.0.3",
            "sdk/v0.1.12",
            "v1.2.0-beta2",
            "v1.2.0-beta1",
            "sdk/v0.1.11",
            "sdk/v0.1.10",
            "api/v1.0.2",
            "v1.1.1",
            "sdk/v0.1.9",
            "api/v1.0.1",
            "sdk/v0.1.8",
            "v1.1.0",
            "v1.1.0-beta2",
            "v1.1.0-beta1",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v0.10.2",
            "v1.0.0",
            "v1.0.0-rc1",
            "v1.0.0-beta2",
            "v1.0.0-beta1",
            "v0.11.2",
            "v0.11.1",
            "v0.11.0",
            "v0.11.0-beta1",
            "v0.10.4",
            "v0.10.3",
            "v0.10.1",
            "v0.10.0",
            "v0.10.0-rc1",
            "v0.9.6",
            "v0.9.5",
            "v0.9.4",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.8.0-rc1",
            "v0.8.0-beta1",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.6.5",
            "v0.7.0",
            "v0.7.0-beta1",
            "v0.6.4",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.1-rc3",
            "v0.6.1-rc2",
            "v0.6.1-rc1",
            "v0.6.0-rebuild",
            "v0.6.0",
            "v0.6.0-rc1",
            "v0.5.2",
            "v0.6.0-beta2",
            "v0.6.0-beta1",
            "v0.5.1",
            "v0.5.0",
            "v0.5.0-rc2",
            "v0.5.0-rc1.2",
            "v0.5.0-rc1.1",
            "v0.5.0-rc1",
            "v0.4.0",
            "v0.4.0-rc1",
            "v0.3.1",
            "v0.3.0",
            "v0.3.0-rc",
            "v0.2.0",
            "v0.2.0.rc1",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27400.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:16.752072975Z",
      "provider": "osv",
      "references": [
        "https://discuss.hashicorp.com/t/hcsec-2021-10-vault-s-cassandra-integrations-did-not-validate-tls-certificates/23463"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-27400",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429411,
  "published_at": "2021-04-22T17:15:07.723+00:00"
}