Denial of Service in Action Dispatch

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.029, the 86th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 5 May 2021. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-g8ww-46x2-2p65
• OSV: GHSA-g8ww-46x2-2p65
• nvd.nist.gov/vuln/detail/CVE-2021-22902
• hackerone.com/reports/1138654
• discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866
• github.com/rails/rails/releases/tag/v6.0.3.7
• github.com/rails/rails/releases/tag/v6.1.3.2
• github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22902.yml
• groups.google.com/g/rubyonrails-security/c/_5ID_ld9u1c

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.