Security advisory

{
  "id": "b4a561630af7e6f4d2f4ae793a5c2c81516610c4a4350c1b8f89980011832a28",
  "url": "https://osv.dev/vulnerability/CVE-2020-11050",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-11050",
    "summary": "In Java-WebSocket less than or equal to 1.4.1, there is an Improper Validation of Certificate with Host Mismatch where WebSocketClient does not perform SSL hostname validation. This has been patched in 1.5.0.",
    "evidence": "osv:CVE-2020-11050",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-11050",
      "aliases": [
        "CVE-2020-11050",
        "GHSA-gw55-jm4h-x339"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tootallnate/java-websocket",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "1c7096294e4f5f99c117bba84a52b8fe9af65e6c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:java-websocket_project:java-websocket:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.4.1",
            "v1.4.0",
            "v1.3.9",
            "v1.3.8",
            "v1.3.3",
            "v1.3.1",
            "v1.3.7",
            "v1.3.6",
            "Java-WebSocket-1.3.5",
            "Java-WebSocket-1.3.4",
            "Java-WebSocket-1.3.3",
            "Java-WebSocket-1.3.1",
            "Java-WebSocket-1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v1.0.0-alpha1",
            "v0.6",
            "v0.5",
            "v0.4",
            "v0.3",
            "v0.2",
            "v0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11050.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:41.296758817Z",
      "provider": "osv",
      "references": [
        "https://github.com/TooTallNate/Java-WebSocket/security/advisories/GHSA-gw55-jm4h-x339"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-11050",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382760,
  "published_at": "2020-05-07T21:15:11.42+00:00"
}