CVE-2026-55276: CWE-670 Always-Incorrect Control Flow Implementation in Apache Software Foundation Apache Tomcat
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.
AI Analysis
Technical Summary
The vulnerability CVE-2026-55276 in Apache Tomcat is due to an always-incorrect control flow implementation that results in special roles and empty authorization constraints not being included in the logged effective web.xml. This affects multiple major release lines of Apache Tomcat starting from early milestone versions up to specified patched versions. The omission in logging could impact security auditing and monitoring by failing to record certain authorization configurations accurately. The issue is resolved by upgrading to Apache Tomcat versions 11.0.23, 10.1.56, 9.0.119, or 8.5.101 and later.
Potential Impact
This vulnerability impacts the integrity of security-related logging in Apache Tomcat by excluding special roles and empty authorization constraints from the effective web.xml logs. This can lead to incomplete security audits and potentially allow unauthorized access configurations to go unnoticed. The CVSS score of 9.1 reflects a critical impact on confidentiality and integrity without requiring privileges or user interaction.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.23, 10.1.56, 9.0.119, or 8.5.101 or later to remediate this vulnerability. No vendor advisory was provided explicitly in the input, but the description clearly recommends upgrading to these fixed versions. Patch status is confirmed by the provided version upgrade recommendations.
CVE-2026-55276: CWE-670 Always-Incorrect Control Flow Implementation in Apache Software Foundation Apache Tomcat
Description
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.
CVSS v3.1
Score 9.1critical
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
The vulnerability CVE-2026-55276 in Apache Tomcat is due to an always-incorrect control flow implementation that results in special roles and empty authorization constraints not being included in the logged effective web.xml. This affects multiple major release lines of Apache Tomcat starting from early milestone versions up to specified patched versions. The omission in logging could impact security auditing and monitoring by failing to record certain authorization configurations accurately. The issue is resolved by upgrading to Apache Tomcat versions 11.0.23, 10.1.56, 9.0.119, or 8.5.101 and later.
Potential Impact
This vulnerability impacts the integrity of security-related logging in Apache Tomcat by excluding special roles and empty authorization constraints from the effective web.xml logs. This can lead to incomplete security audits and potentially allow unauthorized access configurations to go unnoticed. The CVSS score of 9.1 reflects a critical impact on confidentiality and integrity without requiring privileges or user interaction.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.23, 10.1.56, 9.0.119, or 8.5.101 or later to remediate this vulnerability. No vendor advisory was provided explicitly in the input, but the description clearly recommends upgrading to these fixed versions. Patch status is confirmed by the provided version upgrade recommendations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-16T17:40:51.153Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42de5d27e9c7971980716c
Added to database: 06/29/2026, 21:06:37 UTC
Last enriched: 07/06/2026, 22:24:50 UTC
Last updated: 08/13/2026, 00:46:46 UTC
Views: 356
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