CVE-2024-47887: Rails

Medium severity, CVSS 6.6. EPSS: 1% chance of exploitation in the next 30 days.

Action Pack is a framework for handling and responding to web requests. Starting in version 4.0.0 and prior to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, and 7.2.1.1, there is a possible ReDoS vulnerability in Action Controller's HTTP Token authentication. For applications using HTTP Token authentication via `authenticate_or_request_with_http_token` or similar, a carefully crafted header may cause header parsing to take an unexpected amount of time, possibly resulting in a DoS vulnerability. All users running an affected release should either upgrade to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, or 7.2.1.1 or apply the relevant patch immediately. One may choose to use Ruby 3.2 as a workaround.Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected. Rails 8.0.0.beta1 depends on Ruby 3.2 or greater so is unaffected.

Affected products

• Rails Rails: from 4.0.0, before 6.1.7.9 (fixed in 6.1.7.9); from 7.0.0, before 7.0.8.5 (fixed in 7.0.8.5); from 7.1.0, before 7.1.4.1 (fixed in 7.1.4.1); from 7.2.0, before 7.2.1.1 (fixed in 7.2.1.1)
• Rubyonrails Rails: from 4.0.0, before 6.1.7.9 (fixed in 6.1.7.9); from 7.0.0, before 7.0.8.5 (fixed in 7.0.8.5); from 7.1.0, before 7.1.4.1 (fixed in 7.1.4.1); from 7.2.0, before 7.2.1.1 (fixed in 7.2.1.1)

Published 2024-10-16. Last modified 2026-06-17.