Threats Tagged 'cve-2026-55276'

Multiple security vulnerabilities have been identified and fixed in Apache Tomcat as part of the Red Hat JBoss Web Server 6.0.3 update. These include improper input validation, authentication bypasses, HTTP/2 header validation issues, information disclosure during WebSocket authentication, improper authorization, case sensitivity handling flaws, security constraint bypasses, and insufficient documentation that may lead to insecure configurations. The update addresses these issues to improve the security posture of Tomcat deployments within Red Hat Enterprise Linux environments.

This update for tomcat11 fixes the following issues Update to Tomcat 11.0.23. Security issues fixed: - CVE-2026-50229: improper neutralization of script-related HTML tags in the number guess example (bsc#1269791). - CVE-2026-53404: always-incorrect control flow implementation in the rewrite valve caused non-OR conditions to be skipped if the first condition in an OR chain matched (bsc#1269910). - CVE-2026-53434: error condition not handled when configuring CRLs for a FFM based connector (bsc#1269824). - CVE-2026-55276: always-incorrect control flow implementation caused special roles and empty authorization constraints to not be included when the effective web.xml was logged (bsc#1269909). - CVE-2026-55955: improper authentication allows a replay attack against the EncryptionInterceptor in the cluster component (bsc#1269908). - CVE-2026-55956: improper authorization leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint (bsc#1269907). Other updates and bugfixes: - Upgrade libtcnative to v2 (bsc#1232390) - Tomcat 11.0.23: * Catalina + Add: Add support for literal '%' characters in access log output. Based on pull request #1002 by Fabian Hahn. (markt) + Fix: Lower the log level to debug when OpenSSL initialization fails in OpenSSLLifecycleListener to avoid stack traces when libssl.so is not present and to align the behavior of the isAvailable() check with the AprLifecycleListener and gracefully fail when natives are not present. (csutherl) + Fix: 70038: Cookie.clone() should also clone the internal attribute map. (markt) + Code: Remove unnecessary code from the SSI processing engine that was duplicating some of the normalisation checks. (markt) + Fix: Cleaner handling of invalid SPNEGO tokens. (remm) + Fix: Avoid some NPEs in the Connector class on an uninitialize protocol. (remm) + Fix: Incorrect session average life calculation. (remm) + Fix: Improve robustness on using Pipeline.setBasic on a running pipeline. (remm) + Fix: Avoid any init parameter updates when conflicts are found for filters, similar to what is done for servlets, as required by the servlet specification. (remm) + Fix: Fix container event cleanups in some edge cases. (remm) + Fix: Check for last-modified header in ExpiresFilter when a servlet uses addDateHeader to avoid wrongly considering it has been set. (remm) + Fix: Fix hour unit used by ExpiresFilter. (remm) + Fix: Remove exception swallowing in DataSourceStore to align it with FileStore and avoid session loss on errors. (remm) + Fix: Add support for single-quote escaped literal as well as quoted literals in DateFormatCache. (schultz) + Fix: On JAAS logout, clear out role principals on the subject that were added on commit, as recommended by the JAAS specification. (remm) + Fix: MemoryRealm should not add a dummy role when none is specified in the configuration. (remm) + Fix: DataSourceUserDatabase should return a null principal on a non existing user. (remm) + Fix: Fix shared lock expiration in WebDAV. (remm) + Fix: Inaccurate session exipration statistics when using the persistent manager. (remm) + Fix: Skip BOM when serving files with UTF-32 encoding. (remm) + Fix: Mixup of WrapperListener and WrapperLifecycle elements in storeconfig. (remm) + Fix: Incorrect processing of modified users in DataSourceUserDatabase. (remm) + Update: Clarify behavior in the UserDatabase for user, role and group creation that it does not immediately override existing elements. Removal (or update) needs to be used instead. (remm) + Fix: 70049: Align the web application class loader with parent class loaders and swallow any errors caused by invalid paths when looking up resources and behave as if the resources were not found in that case. (markt) + Fix: Improve validation of Range and Content-Range parsers so invalid ranges trigger a 4xx response rather than a 500 response. Pull request #1012 provided by Sahana Surendra Bogar. (markt) + Fix: Fix connection leak in ProxyErrorReportValve. (remm) + Fix: When using the RewriteValve, %{SSL:HTTPS} now returns on or off rather than true or false to align with httpd. (markt) + Fix: Reset the encoding used for query string parameters between requests in case an application changed the encoding in a previous request. (markt) + Fix: When encoding URLs with the CsrfPreventionFilter, don't add the nonce to URLs that are known not to require it. (markt) + Fix: Fix SSO cookie partitioned configuration. (remm) + Fix: Fix CombinedRealm isAvailable, it allows authentication if at least one sub realm is available. (remm) + Fix: 70048: Correctly handle asynchronous requ

This update for tomcat11 fixes the following issues Update to Tomcat 11.0.23. Security issues fixed: - CVE-2026-50229: improper neutralization of script-related HTML tags in the number guess example (bsc#1269791). - CVE-2026-53404: always-incorrect control flow implementation in the rewrite valve caused non-OR conditions to be skipped if the first condition in an OR chain matched (bsc#1269910). - CVE-2026-53434: error condition not handled when configuring CRLs for a FFM based connector (bsc#1269824). - CVE-2026-55276: always-incorrect control flow implementation caused special roles and empty authorization constraints to not be included when the effective web.xml was logged (bsc#1269909). - CVE-2026-55955: improper authentication allows a replay attack against the EncryptionInterceptor in the cluster component (bsc#1269908). - CVE-2026-55956: improper authorization leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint (bsc#1269907). Other updates and bugfixes: - Upgrade libtcnative to v2 (bsc#1232390) - Tomcat 11.0.23: * Catalina + Add: Add support for literal '%' characters in access log output. Based on pull request #1002 by Fabian Hahn. (markt) + Fix: Lower the log level to debug when OpenSSL initialization fails in OpenSSLLifecycleListener to avoid stack traces when libssl.so is not present and to align the behavior of the isAvailable() check with the AprLifecycleListener and gracefully fail when natives are not present. (csutherl) + Fix: 70038: Cookie.clone() should also clone the internal attribute map. (markt) + Code: Remove unnecessary code from the SSI processing engine that was duplicating some of the normalisation checks. (markt) + Fix: Cleaner handling of invalid SPNEGO tokens. (remm) + Fix: Avoid some NPEs in the Connector class on an uninitialize protocol. (remm) + Fix: Incorrect session average life calculation. (remm) + Fix: Improve robustness on using Pipeline.setBasic on a running pipeline. (remm) + Fix: Avoid any init parameter updates when conflicts are found for filters, similar to what is done for servlets, as required by the servlet specification. (remm) + Fix: Fix container event cleanups in some edge cases. (remm) + Fix: Check for last-modified header in ExpiresFilter when a servlet uses addDateHeader to avoid wrongly considering it has been set. (remm) + Fix: Fix hour unit used by ExpiresFilter. (remm) + Fix: Remove exception swallowing in DataSourceStore to align it with FileStore and avoid session loss on errors. (remm) + Fix: Add support for single-quote escaped literal as well as quoted literals in DateFormatCache. (schultz) + Fix: On JAAS logout, clear out role principals on the subject that were added on commit, as recommended by the JAAS specification. (remm) + Fix: MemoryRealm should not add a dummy role when none is specified in the configuration. (remm) + Fix: DataSourceUserDatabase should return a null principal on a non existing user. (remm) + Fix: Fix shared lock expiration in WebDAV. (remm) + Fix: Inaccurate session exipration statistics when using the persistent manager. (remm) + Fix: Skip BOM when serving files with UTF-32 encoding. (remm) + Fix: Mixup of WrapperListener and WrapperLifecycle elements in storeconfig. (remm) + Fix: Incorrect processing of modified users in DataSourceUserDatabase. (remm) + Update: Clarify behavior in the UserDatabase for user, role and group creation that it does not immediately override existing elements. Removal (or update) needs to be used instead. (remm) + Fix: 70049: Align the web application class loader with parent class loaders and swallow any errors caused by invalid paths when looking up resources and behave as if the resources were not found in that case. (markt) + Fix: Improve validation of Range and Content-Range parsers so invalid ranges trigger a 4xx response rather than a 500 response. Pull request #1012 provided by Sahana Surendra Bogar. (markt) + Fix: Fix connection leak in ProxyErrorReportValve. (remm) + Fix: When using the RewriteValve, %{SSL:HTTPS} now returns on or off rather than true or false to align with httpd. (markt) + Fix: Reset the encoding used for query string parameters between requests in case an application changed the encoding in a previous request. (markt) + Fix: When encoding URLs with the CsrfPreventionFilter, don't add the nonce to URLs that are known not to require it. (markt) + Fix: Fix SSO cookie partitioned configuration. (remm) + Fix: Fix CombinedRealm isAvailable, it allows authentication if at least one sub realm is available. (remm) + Fix: 70048: Correctly handle asynchronous requ

Apache Tomcat versions 8.5.0 through 8.5.100, 9.0.0 through 9.0.118, 10.1.0 through 10.1.55, and 11.0.0 through 11.0.22 have a vulnerability where the effective web.xml logged by the server is incomplete. Specifically, special roles and empty authorization constraints are omitted from the logged configuration, which can reduce auditability of authorization settings. This issue has been fixed in versions 8.5.101, 9.0.119, 10.1.56, and 11.0.23. Users are advised to upgrade to these fixed versions to resolve the issue.

CVE-2026-53404 is a vulnerability in Apache Tomcat's RewriteValve component where incorrect control flow causes subsequent non-OR conditions in an OR chain to be skipped if the first condition matches. This flaw affects multiple Apache Tomcat versions across major branches 8.5, 9.0, 10.1, and 11.0. The issue can lead to bypassing rewrite rules, potentially resulting in unauthorized access. Official patches are available in Apache Tomcat versions 11.0.23, 10.1.56, and 9.0.119. Both Ubuntu and Red Hat have released advisories confirming the vulnerability and providing fixed package versions. No known exploits in the wild have been reported to date.

Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. 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 fixes the issue.

This update includes the following RPMs: tomcat10: * tomcat10-10.1.56-1.hum1 (noarch) * tomcat10-admin-webapps-10.1.56-1.hum1 (noarch) * tomcat10-common-10.1.56-1.hum1 (noarch) * tomcat10-docs-webapp-10.1.56-1.hum1 (noarch) * tomcat10-el-5.0-api-10.1.56-1.hum1 (noarch) * tomcat10-jsp-3.1-api-10.1.56-1.hum1 (noarch) * tomcat10-lib-10.1.56-1.hum1 (noarch) * tomcat10-servlet-6.0-api-10.1.56-1.hum1 (noarch) * tomcat10-user-instance-10.1.56-1.hum1 (noarch) * tomcat10-webapps-10.1.56-1.hum1 (noarch) * tomcat10-10.1.56-1.hum1.src (src)