CVE-2016-2337: Ruby-Lang Ruby

Critical severity, CVSS 9.8. EPSS: 6.2% chance of exploitation in the next 30 days.

Type confusion exists in _cancel_eval Ruby's TclTkIp class method. Attacker passing different type of object than String as "retval" argument can cause arbitrary code execution.

Affected products

• Ruby-Lang Ruby: version 2.2.2 only; version 2.3.0 only

Published 2017-01-06. Last modified 2026-06-17.