Missing XML Validation vulnerability in Apache Struts, Apache Struts. This issue affects Apache Struts: from 2.0.0 before 2.2.1; Apache Struts: from 2.2.1 through 6.1.0. Users are recommended to upgrade to version 6.1.1, which fixes the issue.
https://cwiki.apache.org/confluence/display/WW/S2-069
http://www.openwall.com/lists/oss-security/2026/01/11/2
https://hackread.com/years-old-vulnerable-apache-struts-2-downloads/
Source: Mitre, NVD
Published: 2026-01-11
Updated: 2026-01-16
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C
Severity: High
Base Score: 8.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
EPSS: 0.00037