CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-22902
High (7.5) in rubyonrails rails. EPSS 2.9% chance of exploitation in the next 30 days. Fixed in actionpack 6.0.3.7, 6.1.3.2.
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.
Severity
- EPSS
- 2.9% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-31)
- CWE
- CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- rubyonrails:rails
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g8ww-46x2-2p65 | RubyGems | actionpack | >=6.0.0 <6.0.3.7 | 6.0.3.7 |
| GHSA-g8ww-46x2-2p65 | RubyGems | actionpack | >=6.1.0 <6.1.3.2 | 6.1.3.2 |
References
- https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866
- https://hackerone.com/reports/1138654
- https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866
- https://hackerone.com/reports/1138654