CVE-2011-3186: Rubyonrails Rails

Medium severity, CVSS 4.3. EPSS: 1.7% chance of exploitation in the next 30 days.

CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.

Affected products

• Rubyonrails Rails: version 2.3.2 only; version 2.3.3 only; version 2.3.4 only; version 2.3.9 only; version 2.3.10 only; version 2.3.11 only; …

Published 2011-08-29. Last modified 2026-06-16.