Vulnerability record

CVE-2006-1547

Apache Struts 1 ActionForm Denial-of-Service 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 1, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Jul 21, 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

Patch or advisory on struts.apache.org (opens in a new tab)

Description

ActionForm in Apache Software Foundation (ASF) Struts before 1.2.9 with BeanUtils 1.7 allows remote attackers to cause a denial of service via a multipart/form-data encoded form with a parameter name that references the public getMultipartRequestHandler method, which provides further access to elements in the CommonsMultipartRequestHandler implementation and BeanUtils.

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	< 1.2.9	1.2.9	NVD
Struts 1	Apache Software Foundation	—	—	KEV

Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2006-1547 scored CVSS 7.5: Apache Struts 1, Apache Struts 1 ActionForm Denial-of-Service Vulnerability
CISA lists this as exploited in the wild. Unpatched Struts 1 systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2006-1547: Apache Struts 1, Apache Struts 1 ActionForm Denial-of-Service Vulnerability
An official fix is now available for Apache Struts 1. 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-2006-1547
issues.apache.org http://issues.apache.org/bugzilla/show_bug.cgi?id=38534
lists.suse.com http://lists.suse.com/archive/suse-security-announce/2006-May/0004.html
secunia.com http://secunia.com/advisories/19493
secunia.com http://secunia.com/advisories/20117
securitytracker.com http://securitytracker.com/id?1015856
struts.apache.org http://struts.apache.org/struts-doc-1.2.9/userGuide/release-notes.html
securityfocus.com http://www.securityfocus.com/bid/17342
vupen.com http://www.vupen.com/english/advisories/2006/1205
exchange.xforce.ibmcloud.com https://exchange.xforce.ibmcloud.com/vulnerabilities/25613
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2006-1547