Vulnerability record

CVE-2018-11776

Apache Struts Remote Code Execution Vulnerability

HighExploitation confirmedCISA KEV

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Struts, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by May 3, 2022.

Patch status

Official fix available since Sep 30, 2026

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Fixed in	Source
Struts	Apache Software Foundation	>= 2.0.4, < 2.3.35; >= 2.5.0, < 2.5.17	2.3.35; 2.5.17	KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2018-11776 scored CVSS 8.1: Apache Struts, Apache Struts Remote Code Execution Vulnerability
CISA lists this as exploited in the wild. Unpatched Struts systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2018-11776: Apache Struts, Apache Struts Remote Code Execution Vulnerability
An official fix is now available for Apache Struts. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2018-11776
packetstormsecurity.com http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.html
arubanetworks.com http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-005.txt
oracle.com http://www.oracle.com/technetwork/security-advisory/alert-cve-2018-11776-5072787.html
oracle.com http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
securityfocus.com http://www.securityfocus.com/bid/105125
securitytracker.com http://www.securitytracker.com/id/1041547
securitytracker.com http://www.securitytracker.com/id/1041888
cwiki.apache.org https://cwiki.apache.org/confluence/display/WW/S2-057
github.com https://github.com/hook-s3c/CVE-2018-11776-Python-PoC
lgtm.com https://lgtm.com/blog/apache_struts_CVE-2018-11776
lists.apache.org https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.a…
psirt.global.sonicwall.com https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0012
security.netapp.com https://security.netapp.com/advisory/ntap-20180822-0001/
security.netapp.com https://security.netapp.com/advisory/ntap-20181018-0002/
exploit-db.com https://www.exploit-db.com/exploits/45260/
exploit-db.com https://www.exploit-db.com/exploits/45262/
exploit-db.com https://www.exploit-db.com/exploits/45367/
oracle.com https://www.oracle.com/security-alerts/cpujul2020.html
oracle.com https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-11776