CVE-2026-55956: CWE-285 Improper Authorization in Apache Software Foundation Apache Tomcat
An improper authorization vulnerability in Apache Tomcat causes security constraints for the default servlet to ignore method restrictions or omissions configured in the constraint. This affects multiple versions of Apache Tomcat from 7.0.0 through 11.0.22. Upgrading to versions 11.0.23, 10.1.56, or 9.0.119 addresses the issue.
AI Analysis
Technical Summary
CVE-2026-55956 is an improper authorization vulnerability (CWE-285) in Apache Tomcat where security constraints specified for the default servlet do not properly enforce method restrictions or omissions. This flaw allows the default servlet to bypass configured method-based security constraints, potentially permitting unauthorized access to resources. The vulnerability affects Apache Tomcat versions from 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.118, 10.1.0-M1 through 10.1.55, and 11.0.0-M1 through 11.0.22. The issue is fixed in versions 11.0.23, 10.1.56, and 9.0.119.
Potential Impact
The vulnerability may allow unauthorized users to bypass method-based security constraints on the default servlet, potentially exposing restricted resources or functionality. The exact impact depends on the deployment and configuration of affected Tomcat instances.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat versions to 11.0.23, 10.1.56, or 9.0.119 or later, which contain fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation guidance is provided.
CVE-2026-55956: CWE-285 Improper Authorization in Apache Software Foundation Apache Tomcat
Description
An improper authorization vulnerability in Apache Tomcat causes security constraints for the default servlet to ignore method restrictions or omissions configured in the constraint. This affects multiple versions of Apache Tomcat from 7.0.0 through 11.0.22. Upgrading to versions 11.0.23, 10.1.56, or 9.0.119 addresses the issue.
Affected software
pkg:maven/org.apache.tomcat/tomcatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55956 is an improper authorization vulnerability (CWE-285) in Apache Tomcat where security constraints specified for the default servlet do not properly enforce method restrictions or omissions. This flaw allows the default servlet to bypass configured method-based security constraints, potentially permitting unauthorized access to resources. The vulnerability affects Apache Tomcat versions from 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.118, 10.1.0-M1 through 10.1.55, and 11.0.0-M1 through 11.0.22. The issue is fixed in versions 11.0.23, 10.1.56, and 9.0.119.
Potential Impact
The vulnerability may allow unauthorized users to bypass method-based security constraints on the default servlet, potentially exposing restricted resources or functionality. The exact impact depends on the deployment and configuration of affected Tomcat instances.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat versions to 11.0.23, 10.1.56, or 9.0.119 or later, which contain fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-17T18:36:32.030Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42de5d27e9c79719807172
Added to database: 06/29/2026, 21:06:37 UTC
Last enriched: 06/29/2026, 21:21:36 UTC
Last updated: 06/29/2026, 21:21:36 UTC
Views: 3
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