Incorrect Control Flow in Apache Tomcat Rewrite Valve

Publication date: 2026-06-29

Last updated on: 2026-06-29

Assigner: Apache Software Foundation

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 Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-29

Last Modified

2026-06-29

Generated

2026-06-30

AI Q&A

2026-06-30

EPSS Evaluated

N/A

NVD

CVE-2026-53404

Affected Vendors & Products

Vendor	Product	Version / Range
apache	tomcat	From 11.0.0-m1 (inc) to 11.0.22 (inc)
apache	tomcat	From 10.1.0-m1 (inc) to 10.1.55 (inc)
apache	tomcat	From 9.0.0.m1 (inc) to 9.0.118 (inc)
apache	tomcat	From 8.5.0 (inc) to 8.5.100 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-670	The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.

Attack-Flow Graph

Executive Summary

This vulnerability is an Always-Incorrect Control Flow Implementation issue in Apache Tomcat's rewrite valve. It means that when evaluating a chain of conditions connected by OR operators, if the first condition matches, the system incorrectly skips evaluating subsequent conditions that are not connected by OR.

Impact Analysis

Because the rewrite valve may skip evaluating certain conditions, it could lead to incorrect processing of URL rewriting rules. This might cause unexpected behavior in web applications, potentially allowing unauthorized access or bypassing intended restrictions.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache Tomcat to versions 11.0.23, 10.1.56, or 9.0.119, which contain the fix for this issue.

Hi! I’m here to help you understand CVE-2026-53404. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70