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tomcat: Apache Tomcat: Access control bypass due to off-by-one error in RewriteValve [N] flag processing

🗓️ 07 Oct 2026 14:02:59Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 9 Views

Access control bypass in Apache Tomcat RewriteValve due to off-by-one error in [N] flag.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8noarchjws7-tomcat11.0.21-7.redhat_00006.1.el8jwsjws7-tomcat-11.0.21-7.redhat_00006.1.el8jws.noarch.rpm
Red Hat Enterprise Linux9noarchjws7-tomcat11.0.21-7.redhat_00006.1.el9jwsjws7-tomcat-11.0.21-7.redhat_00006.1.el9jws.noarch.rpm
Red Hat Enterprise Linux10noarchjws7-tomcat11.0.21-7.redhat_00006.1.el10jwsjws7-tomcat-11.0.21-7.redhat_00006.1.el10jws.noarch.rpm
Red Hat Enterprise Linux8noarchjws7-tomcat-admin-webapps11.0.21-7.redhat_00006.1.el8jwsjws7-tomcat-admin-webapps-11.0.21-7.redhat_00006.1.el8jws.noarch.rpm
Red Hat Enterprise Linux9noarchjws7-tomcat-admin-webapps11.0.21-7.redhat_00006.1.el9jwsjws7-tomcat-admin-webapps-11.0.21-7.redhat_00006.1.el9jws.noarch.rpm
Red Hat Enterprise Linux10noarchjws7-tomcat-admin-webapps11.0.21-7.redhat_00006.1.el10jwsjws7-tomcat-admin-webapps-11.0.21-7.redhat_00006.1.el10jws.noarch.rpm
Red Hat Enterprise Linux8noarchjws7-tomcat-docs-webapp11.0.21-7.redhat_00006.1.el8jwsjws7-tomcat-docs-webapp-11.0.21-7.redhat_00006.1.el8jws.noarch.rpm
Red Hat Enterprise Linux9noarchjws7-tomcat-docs-webapp11.0.21-7.redhat_00006.1.el9jwsjws7-tomcat-docs-webapp-11.0.21-7.redhat_00006.1.el9jws.noarch.rpm
Red Hat Enterprise Linux10noarchjws7-tomcat-docs-webapp11.0.21-7.redhat_00006.1.el10jwsjws7-tomcat-docs-webapp-11.0.21-7.redhat_00006.1.el10jws.noarch.rpm
Red Hat Enterprise Linux8noarchjws7-tomcat-el-5.0-api11.0.21-7.redhat_00006.1.el8jwsjws7-tomcat-el-5.0-api-11.0.21-7.redhat_00006.1.el8jws.noarch.rpm
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08 Oct 2026 23:36Current
7.1High risk
Vulners AI Score7.1
CVSS 3.17.5
EPSS0.00684
SSVC
CWE-193
Apache TomcatRewriteValveaccess control bypassoff-by-one errorunix
9