Security advisory

{
  "id": "3c5001cf8e3e99b6b7cd16cc0c930bea1b244e2f864a39c73e5dfebbc739dfa1",
  "url": "https://osv.dev/vulnerability/CVE-2021-22902",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-22902",
    "summary": "The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.",
    "evidence": "osv:CVE-2021-22902",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-22902",
      "aliases": [
        "CVE-2021-22902",
        "GHSA-g8ww-46x2-2p65"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rails/rails",
              "type": "GIT",
              "events": [
                {
                  "introduced": "66cabeda2c46c582d19738e1318be8d59584cc5b"
                },
                {
                  "fixed": "c04aff675d4cd3e8a54e0008dbfca10a8832a414"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0.0"
                      },
                      {
                        "fixed": "6.0.3.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.0.3.6",
            "v6.0.3.5",
            "v6.0.3.4",
            "v6.0.3.3",
            "v6.0.3.2",
            "v6.0.3.1",
            "v6.0.3",
            "v6.0.3.rc1",
            "v6.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22902.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:33.803015267Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/1138654",
        "https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "rubyonrails:rails",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "6.1.0"
                  },
                  {
                    "fixed": "6.1.0.2"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-22902",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433375,
  "published_at": "2021-06-11T16:15:11.36+00:00"
}