CVE-2021-22904

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

Vendor	Product	Versions
n/a	https://github.com/rails/rails	Fixed in 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6

References

https://discuss.rubyonrails.org/t/cve-2021-22904-possible-dos-vulnerability-in-action-controller-token-authentication/77869Exploit, Mitigation, Patch, Vendor Advisory
https://hackerone.com/reports/1101125Permissions Required, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0009/Third Party Advisory
https://discuss.rubyonrails.org/t/cve-2021-22904-possible-dos-vulnerability-in-action-controller-token-authentication/77869Exploit, Mitigation, Patch, Vendor Advisory
https://hackerone.com/reports/1101125Permissions Required, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210805-0009/Third Party Advisory

Timeline

Published: Jun 11, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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