Exploited in the wild. CISA added it to its Known Exploited Vulnerabilities list on 8 Oct 2026.
97%
Reading the vendor advisory
Fix it in your code
Each opens with a short prompt that points at Global Hack Map's public runbook for CVE-2016-3081. Nothing runs until you send it.
Apache Struts 2.3.19 to 2.3.20.2, 2.3.21 to 2.3.24.1, and 2.3.25 to 2.3.28, when Dynamic Method Invocation is enabled, allow remote attackers to execute arbitrary code via method: prefix, related to chained expressions.
You are affected if
The fix