CVE-2016-8738: Apache Struts

Medium severity, CVSS 5.9. EPSS: 3.3% chance of exploitation in the next 30 days.

In Apache Struts 2.5 through 2.5.5, if an application allows entering a URL in a form field and the built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL.

Affected products

• Apache Struts: version 2.5 only; version 2.5.1 only; version 2.5.2 only; version 2.5.3 only; version 2.5.4 only; version 2.5.5 only

Published 2017-09-20. Last modified 2026-06-17.