CVE-2026-53404

A flaw was found in Apache Tomcat's rewrite valve. This vulnerability involves an incorrect control flow implementation where, during the processing of rewrite rules, if the first condition in an OR chain matched, subsequent non-OR conditions were unexpectedly skipped. This can lead to unintended rule processing, potentially allowing for security bypasses or unauthorized access due to misapplied configurations.

A flaw was found in Apache Tomcat's RewriteValve. When rewrite rules use OR-chained conditions followed by non-OR conditions, the processing logic may not evaluate conditions correctly, potentially allowing unintended rule matches. Exploitation requires the RewriteValve to be enabled with specific OR-chained condition patterns, which is not a default configuration.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

This vulnerability only affects Tomcat deployments that use the RewriteValve with OR-chained rewrite conditions. Deployments that do not use the RewriteValve are not affected. Review rewrite rules for OR-chained conditions and test rule evaluation behavior.