CVE-2021-22902

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.

• CWE-400

• https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866Exploit, Mitigation, Patch, Vendor Advisory
• https://hackerone.com/reports/1138654Permissions Required, Third Party Advisory
• https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866Exploit, Mitigation, Patch, Vendor Advisory
• https://hackerone.com/reports/1138654Permissions Required, Third Party Advisory

Published

Jun 11, 2021

Last Modified

Jun 17, 2026

Status

Modified

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