{
  "schema_version": "1.3.1",
  "id": "GO-2024-2883",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2025-47908",
    "GHSA-mh55-gqvf-xfwm"
  ],
  "summary": "Denial of service via malicious preflight requests in github.com/rs/cors",
  "details": "Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.",
  "affected": [
    {
      "package": {
        "name": "github.com/rs/cors",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "1.9.0"
            },
            {
              "fixed": "1.11.0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/rs/cors",
            "symbols": [
              "AllowAll",
              "Cors.HandlerFunc",
              "Cors.ServeHTTP",
              "Cors.areHeadersAllowed",
              "Cors.handlePreflight",
              "Default",
              "New",
              "splitHeaderValues"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/rs/cors/pull/171"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rs/cors/issues/170"
    }
  ],
  "credits": [
    {
      "name": "@jub0bs"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2024-2883",
    "review_status": "REVIEWED"
  }
}