CVE-2015-7576: Rubyonrails Rails

Low severity, CVSS 3.7. EPSS: 4.9% chance of exploitation in the next 30 days.

The http_basic_authenticate_with method in actionpack/lib/action_controller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not use a constant-time algorithm for verifying credentials, which makes it easier for remote attackers to bypass authentication by measuring timing differences.

Affected products

• Rubyonrails Rails: version 4.0.0 only; version 4.0.1 only; version 4.0.2 only; version 4.0.3 only; version 4.0.4 only; version 4.0.5 only; …
• Rubyonrails Ruby On Rails: up to and including 3.2.22; version 4.0.10 only; version 4.0.11 only; version 4.0.11.1 only; version 4.0.12 only; version 4.0.13 only; …

Published 2016-02-16. Last modified 2026-06-17.