CVE-2026-65927

CVE-2026-65927: Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

Vendor Apache Software Foundation
Product Apache Tomcat
Weakness CWE-193
Published August 25, 2026
Last update August 25, 2026

CVSS base score

What the vulnerability does

01Description

Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.

Key dates

02Disclosure timeline

August 25, 2026 CVE published