Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tomcat-libUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-admin-webappsUpgrade tomcat-el-3.0-apiUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade tomcatUpgrade tomcat-webapps | Oct 11, 2026 | Sep 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-libUpgrade tomcatUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-webappsUpgrade tomcat-jsvcUpgrade tomcat-el-3.0-apiUpgrade tomcat-admin-webapps | Jun 9, 2026 | Jun 9, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 11.0.22Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 10.1.55Upgrade Apache Tomcat to 9.0.118 | May 12, 2026 | May 12, 2026 |
| Debian | — | Upgrade tomcat11Upgrade tomcat10Upgrade tomcat9 | May 14, 2026 | May 14, 2026 |
| Redhat_linux | — | Upgrade tomcat-servlet-6.0-apiUpgrade jws6-tomcat-el-5.0-apiUpgrade jws6-tomcat-webappsUpgrade tomcat-libUpgrade tomcat-webappsUpgrade tomcat-admin-webappsUpgrade tomcat9-el-3.0-apiUpgrade jws6-tomcat-jsp-3.1-apiUpgrade jws7-tomcat-nativeUpgrade tomcat-el-3.0-apiUpgrade jws7-mod_cluster-tomcatUpgrade jws7-javapackages-toolsUpgrade jws7-javapackages-filesystemUpgrade jws7-buildUpgrade jws7-tomcat-selinuxUpgrade jws7-tomcat-jsp-3.1-apiUpgrade jws7-tomcat-vault-javadocUpgrade tomcat-docs-webappUpgrade jws7-tomcat-javadocUpgrade jws6-tomcat-selinuxUpgrade tomcat9-docs-webappUpgrade tomcat9-webappsUpgrade jws7-tomcat-docs-webappUpgrade jws7-mod_clusterUpgrade tomcat-jsp-2.3-apiUpgrade jws7-python3-javapackagesUpgrade jws7-tomcat-servlet-6.0-apiUpgrade jws7-tomcat-libUpgrade jws7-jboss-loggingUpgrade jws7-tomcat-native-debuginfoUpgrade jws7-tomcat-admin-webappsUpgrade jws6-tomcat-libUpgrade jws6-tomcat-javadocUpgrade jws6-tomcat-servlet-6.0-apiUpgrade jws7-tomcat-webappsUpgrade jws7-runtimeUpgrade tomcat9-jsp-2.3-apiUpgrade tomcat-servlet-4.0-apiUpgrade jws6-tomcatUpgrade tomcat-jsp-3.1-apiUpgrade tomcat9-libUpgrade tomcat-el-5.0-apiUpgrade jws7-tomcatUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat9-admin-webappsUpgrade jws6-tomcat-docs-webappNo solution existsUpgrade tomcatUpgrade tomcat9Upgrade jws6-tomcat-admin-webappsUpgrade jws7-ecjUpgrade jws7-tomcat-el-5.0-apiUpgrade jws7-tomcat-vault | Jul 17, 2026 | May 12, 2026 |
| Ubuntu | — | Upgrade libtomcat10-javaUpgrade libtomcat10-embed-java (Ubuntu Pro)Upgrade tomcat9 (Ubuntu Pro)Upgrade libtomcat9-java (Ubuntu Pro)Upgrade libtomcat11-java (Ubuntu Pro)Upgrade libtomcat9-embed-java (Ubuntu Pro)Upgrade libtomcat10-java (Ubuntu Pro)Upgrade tomcat11 (Ubuntu Pro)Upgrade libtomcat9-javaUpgrade libtomcat10-embed-javaUpgrade libtomcat11-embed-java (Ubuntu Pro)Upgrade tomcat10Upgrade tomcat10 (Ubuntu Pro) | Jun 16, 2026 | Jun 10, 2026 |
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