CVE-2010-1330: Jruby

Medium severity, CVSS 4.3. EPSS: 2.2% chance of exploitation in the next 30 days.

The regular expression engine in JRuby before 1.4.1, when $KCODE is set to 'u', does not properly handle characters immediately after a UTF-8 character, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted string.

Affected products

• Jruby Jruby: up to and including 1.4.0; version 0.9.0 only; version 0.9.1 only; version 0.9.2 only; version 0.9.8 only; version 0.9.9 only; …

Published 2012-11-23. Last modified 2026-06-16.