CVE-2011-3624: Ruby-Lang Ruby

Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days.

Various methods in WEBrick::HTTPRequest in Ruby 1.9.2 and 1.8.7 and earlier do not validate the X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers in requests, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header.

Affected products

• Ruby-Lang Ruby: version 1.8.7 only; version 1.9.2 only

Published 2019-11-26. Last modified 2026-06-16.