CVE-2013-6414: actionpack/lib/action_view/lookup_context.rb in Action View in Ruby on Rails 3.x before 3.2.16 and 4.x befo...

Security readout for executives and security teams

This is an older Ruby on Rails denial-of-service flaw. A remote request with an invalid MIME type header could cause excessive caching in Action View, consuming memory and potentially disrupting the application. The sources identify fixed Rails releases, but provide no CVSS score or evidence of active exploitation. Exposure is most likely in legacy Rails 3.x or early Rails 4.x applications, including packaged downstream products that embedded vulnerable Rails components. Publicly reachable web applications have higher operational risk because the triggering input is remote HTTP header data. Treat this as a targeted legacy exposure issue. It is not marked as actively exploited in the supplied sources, but internet-facing vulnerable Rails applications could be forced into outage. Prioritize discovery and patching where old Rails is still business-critical. Mitigation focus: Upgrade Rails to 3.2.16, 4.0.2, or a later supported release.; Patch OS or vendor-packaged Rails using Red Hat, Debian, SUSE, Puppet, or Chef guidance as applicable.; Inventory legacy Rails applications and embedded Rails dependencies in appliances or management platforms..

Prepared

Jun 14, 2026, 15:13 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.