Red Hat Security Advisory: tomcat9 security, bug fix, and enhancement update
Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process. Tomcat is developed in an open and participatory environment and released under the Apache Software License version 2.0. Tomcat is intended to be a collaboration of the best-of-breed developers from around the world. Security Fix(es): * Apache Tomcat: Apache Tomcat: Information disclosure via Padding Oracle vulnerability in EncryptInterceptor (CVE-2026-29146) * Apache Tomcat: Apache Tomcat: Missing Encryption of Sensitive Data due to EncryptInterceptor bypass (CVE-2026-34486) Bug Fix(es) and Enhancement(s): * Remove tomcat clustering JAR from RPM builds (JIRA:RHEL-185571) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory covers two security vulnerabilities in Apache Tomcat's EncryptInterceptor component used in tomcat9 on Red Hat Enterprise Linux 10. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle attack vector, allowing attackers to potentially decrypt sensitive data. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass in the EncryptInterceptor, exposing data that should be protected. The advisory also includes bug fixes and enhancements unrelated to security. The update is provided as a security fix in tomcat9 version 9.0.117-2.el10_2 and related packages.
Potential Impact
Successful exploitation of CVE-2026-29146 could lead to unauthorized disclosure of sensitive information through a Padding Oracle attack on the EncryptInterceptor. CVE-2026-34486 could allow sensitive data to be exposed due to encryption bypass. Both vulnerabilities compromise the confidentiality of data handled by the EncryptInterceptor in tomcat9. There are no known exploits in the wild at the time of this advisory. The overall security impact is rated as Important (high).
Mitigation Recommendations
Red Hat has released an updated tomcat9 package (version 9.0.117-2.el10_2) that addresses these vulnerabilities. Users should apply this update promptly to remediate the issues. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official update.
Red Hat Security Advisory: tomcat9 security, bug fix, and enhancement update
Description
Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process. Tomcat is developed in an open and participatory environment and released under the Apache Software License version 2.0. Tomcat is intended to be a collaboration of the best-of-breed developers from around the world. Security Fix(es): * Apache Tomcat: Apache Tomcat: Information disclosure via Padding Oracle vulnerability in EncryptInterceptor (CVE-2026-29146) * Apache Tomcat: Apache Tomcat: Missing Encryption of Sensitive Data due to EncryptInterceptor bypass (CVE-2026-34486) Bug Fix(es) and Enhancement(s): * Remove tomcat clustering JAR from RPM builds (JIRA:RHEL-185571) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security vulnerabilities in Apache Tomcat's EncryptInterceptor component used in tomcat9 on Red Hat Enterprise Linux 10. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle attack vector, allowing attackers to potentially decrypt sensitive data. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass in the EncryptInterceptor, exposing data that should be protected. The advisory also includes bug fixes and enhancements unrelated to security. The update is provided as a security fix in tomcat9 version 9.0.117-2.el10_2 and related packages.
Potential Impact
Successful exploitation of CVE-2026-29146 could lead to unauthorized disclosure of sensitive information through a Padding Oracle attack on the EncryptInterceptor. CVE-2026-34486 could allow sensitive data to be exposed due to encryption bypass. Both vulnerabilities compromise the confidentiality of data handled by the EncryptInterceptor in tomcat9. There are no known exploits in the wild at the time of this advisory. The overall security impact is rated as Important (high).
Mitigation Recommendations
Red Hat has released an updated tomcat9 package (version 9.0.117-2.el10_2) that addresses these vulnerabilities. Users should apply this update promptly to remediate the issues. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:36790
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-34486"]
- Cvss Version
- null
Threat ID: 6a4f6c1068715ace43153759
Added to database: 07/09/2026, 09:38:24 UTC
Last enriched: 08/04/2026, 15:25:14 UTC
Last updated: 08/23/2026, 22:52:09 UTC
Views: 104
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