Security advisory

{
  "id": "77c336b2140ea1fd1d1d3f0ee44d7b8567506f0b3045d3d37f18026b68db13b4",
  "url": "https://osv.dev/vulnerability/CVE-2018-20744",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20744",
    "summary": "The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.",
    "evidence": "osv:CVE-2018-20744",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-20744",
      "aliases": [
        "CVE-2018-20744",
        "GHSA-927h-x4qj-r242",
        "GO-2023-1792"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rs/cors",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "feef513b9575b32f84bafa580aad89b011259019"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:go_cors_project:go_cors:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.0",
            "v1.2",
            "v1.1",
            "v1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20744.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:54.743515008Z",
      "provider": "osv",
      "references": [
        "https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf",
        "https://github.com/rs/cors/issues/55"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20744",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380975,
  "published_at": "2019-01-28T08:29:00.23+00:00"
}