CVE-2026-53404: CWE-670 Always-Incorrect Control Flow Implementation in Apache Software Foundation Apache Tomcat
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. 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 fix the issue.
AI Analysis
Technical Summary
The vulnerability CVE-2026-53404 in Apache Tomcat's rewrite valve arises from an always-incorrect control flow implementation. When evaluating condition chains with OR operators, if the first condition matches, the logic incorrectly skips subsequent non-OR conditions. This flaw affects Apache Tomcat versions from 8.5.0 up to 8.5.100, 9.0.0.M1 up to 9.0.118, 10.1.0-M1 up to 10.1.55, and 11.0.0-M1 up to 11.0.22. The issue is resolved in versions 11.0.23, 10.1.56, and 9.0.119. The CVSS v3.1 score of 7.3 reflects a network attack vector with low attack complexity, no privileges or user interaction required, and impacts confidentiality, integrity, and availability.
Potential Impact
This vulnerability can cause incorrect processing of rewrite rules in Apache Tomcat, potentially leading to unintended request handling or bypass of intended conditions. The impact includes partial loss of confidentiality, integrity, and availability as indicated by the CVSS vector. The flaw could be exploited remotely without authentication or user interaction.
Mitigation Recommendations
A fix is available. Users should upgrade affected Apache Tomcat versions to 11.0.23, 10.1.56, or 9.0.119 to remediate this vulnerability. No other mitigation guidance is provided or required beyond applying these official updates.
CVE-2026-53404: CWE-670 Always-Incorrect Control Flow Implementation in Apache Software Foundation Apache Tomcat
Description
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. 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 fix the issue.
CVSS v3.1
Score 7.3high
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-2026-53404 in Apache Tomcat's rewrite valve arises from an always-incorrect control flow implementation. When evaluating condition chains with OR operators, if the first condition matches, the logic incorrectly skips subsequent non-OR conditions. This flaw affects Apache Tomcat versions from 8.5.0 up to 8.5.100, 9.0.0.M1 up to 9.0.118, 10.1.0-M1 up to 10.1.55, and 11.0.0-M1 up to 11.0.22. The issue is resolved in versions 11.0.23, 10.1.56, and 9.0.119. The CVSS v3.1 score of 7.3 reflects a network attack vector with low attack complexity, no privileges or user interaction required, and impacts confidentiality, integrity, and availability.
Potential Impact
This vulnerability can cause incorrect processing of rewrite rules in Apache Tomcat, potentially leading to unintended request handling or bypass of intended conditions. The impact includes partial loss of confidentiality, integrity, and availability as indicated by the CVSS vector. The flaw could be exploited remotely without authentication or user interaction.
Mitigation Recommendations
A fix is available. Users should upgrade affected Apache Tomcat versions to 11.0.23, 10.1.56, or 9.0.119 to remediate this vulnerability. No other mitigation guidance is provided or required beyond applying these official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-09T08:52:02.309Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42de5d27e9c79719807166
Added to database: 06/29/2026, 21:06:37 UTC
Last enriched: 07/06/2026, 22:28:22 UTC
Last updated: 08/13/2026, 00:41:12 UTC
Views: 175
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