8.1
High
CVE-2018-11776 Apache Struts Remote Code Execution Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-20
Description
Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn't have value and action set and in same time, its upper package have no or wildcard namespace.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Struts | Versions not published |
Other CVEs of Apache Struts
The 33 CVEs of Apache Struts →
CVE-2026-104714
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CVE-2026-104713
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CVE-2026-104712
Asymmetric resource consumption (amplification) vulnerability in Apache Struts
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CVE-2026-104711
Improper neutralization of special elements used in an expression language statement ('Expression Language Injection')…
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