{"id":"CVE-2016-8738","aliases":["GHSA-86vq-8qhc-5rqw"],"url":"https://o3.security/vulnerability/CVE-2016-8738","summary":"Apache Struts vulnerable to possible DoS attack when using URLValidator","details":"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.","published":"2017-09-20T17:29:00.337Z","modified":"2026-07-08T05:49:03.914604086Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.struts:struts2-core","fixedVersion":"2.5.13"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/94657"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20180629-0003/"},{"type":"FIX","url":"https://struts.apache.org/docs/s2-044.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:49:03.914604086Z"}}