Red Hat Security Advisory: tomcat security, bug fix, and enhancement update
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. 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-168577) 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 as packaged by Red Hat for Red Hat Enterprise Linux 10. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle issue in the EncryptInterceptor component. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass of the EncryptInterceptor. Both vulnerabilities could potentially expose sensitive information. The update also removes the tomcat clustering JAR from RPM builds as a bug fix and enhancement. Red Hat has provided a patch to address these vulnerabilities in tomcat version 10.1.49-3.el10_2.noarch and related packages.
Potential Impact
The vulnerabilities could lead to unauthorized disclosure of sensitive information through cryptographic weaknesses in the EncryptInterceptor component of Apache Tomcat. This may compromise confidentiality of data processed by the affected Tomcat instances. The severity is rated as high by Red Hat Product Security, indicating a significant security impact if exploited. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A patch is available from Red Hat to address these vulnerabilities. Users should apply the updated tomcat packages (version 10.1.49-3.el10_2.noarch and related) for Red Hat Enterprise Linux 10 as soon as possible. Detailed update instructions are available in the Red Hat advisory RHSA-2026:36788 and the referenced Red Hat article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: tomcat security, bug fix, and enhancement update
Description
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. 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-168577) 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
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security vulnerabilities in Apache Tomcat as packaged by Red Hat for Red Hat Enterprise Linux 10. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle issue in the EncryptInterceptor component. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass of the EncryptInterceptor. Both vulnerabilities could potentially expose sensitive information. The update also removes the tomcat clustering JAR from RPM builds as a bug fix and enhancement. Red Hat has provided a patch to address these vulnerabilities in tomcat version 10.1.49-3.el10_2.noarch and related packages.
Potential Impact
The vulnerabilities could lead to unauthorized disclosure of sensitive information through cryptographic weaknesses in the EncryptInterceptor component of Apache Tomcat. This may compromise confidentiality of data processed by the affected Tomcat instances. The severity is rated as high by Red Hat Product Security, indicating a significant security impact if exploited. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A patch is available from Red Hat to address these vulnerabilities. Users should apply the updated tomcat packages (version 10.1.49-3.el10_2.noarch and related) for Red Hat Enterprise Linux 10 as soon as possible. Detailed update instructions are available in the Red Hat advisory RHSA-2026:36788 and the referenced Red Hat article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated 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-2026:36788
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-34486"]
- Cvss Version
- null
Threat ID: 6a4f6c1068715ace43153768
Added to database: 07/09/2026, 09:38:24 UTC
Last enriched: 08/04/2026, 15:23:11 UTC
Last updated: 08/24/2026, 02:41:59 UTC
Views: 64
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.