{"id":"CVE-2021-22904","aliases":["GHSA-7wjx-3g7j-8584"],"url":"https://o3.security/vulnerability/CVE-2021-22904","summary":"Possible DoS Vulnerability in Action Controller Token Authentication","details":"The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.","published":"2021-06-11T16:15:11.517Z","modified":"2026-08-07T15:15:09.255385Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"6.0.3.7"},{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"6.1.3.2"},{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"5.2.6"},{"ecosystem":"RubyGems","name":"actionpack","fixedVersion":"5.2.4.6"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210805-0009/"},{"type":"REPORT","url":"https://hackerone.com/reports/1101125"},{"type":"FIX","url":"https://discuss.rubyonrails.org/t/cve-2021-22904-possible-dos-vulnerability-in-action-controller-token-authentication/77869"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:15:09.255385Z"}}