Red Hat Security Advisory: tomcat9 security 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) 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 flaws in Apache Tomcat's EncryptInterceptor component. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle attack vector. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass of the EncryptInterceptor. Both vulnerabilities affect tomcat9 packages distributed with Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat has released updated tomcat9 packages (version 9.0.87-6.el10_0) to address these issues.
Potential Impact
Successful exploitation of CVE-2026-29146 could lead to unauthorized disclosure of sensitive information through a Padding Oracle attack on EncryptInterceptor. CVE-2026-34486 could allow sensitive data to be transmitted without encryption due to bypassing the EncryptInterceptor, potentially exposing confidential information. The overall impact is rated as Important by Red Hat, indicating a high security risk if unpatched.
Mitigation Recommendations
Red Hat has released updated tomcat9 packages (version 9.0.87-6.el10_0) for Red Hat Enterprise Linux 10.0 Extended Update Support that fix these vulnerabilities. Users should apply these updates promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified in the advisory.
Red Hat Security Advisory: tomcat9 security 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) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security flaws in Apache Tomcat's EncryptInterceptor component. CVE-2026-29146 is an information disclosure vulnerability caused by a Padding Oracle attack vector. CVE-2026-34486 involves missing encryption of sensitive data due to a bypass of the EncryptInterceptor. Both vulnerabilities affect tomcat9 packages distributed with Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat has released updated tomcat9 packages (version 9.0.87-6.el10_0) to address these issues.
Potential Impact
Successful exploitation of CVE-2026-29146 could lead to unauthorized disclosure of sensitive information through a Padding Oracle attack on EncryptInterceptor. CVE-2026-34486 could allow sensitive data to be transmitted without encryption due to bypassing the EncryptInterceptor, potentially exposing confidential information. The overall impact is rated as Important by Red Hat, indicating a high security risk if unpatched.
Mitigation Recommendations
Red Hat has released updated tomcat9 packages (version 9.0.87-6.el10_0) for Red Hat Enterprise Linux 10.0 Extended Update Support that fix these vulnerabilities. Users should apply these updates promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified in the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:36789
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-34486"]
- Cvss Version
- null
Threat ID: 6a4f6c1068715ace43153761
Added to database: 07/09/2026, 09:38:24 UTC
Last enriched: 08/07/2026, 17:05:53 UTC
Last updated: 08/23/2026, 22:52:09 UTC
Views: 59
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.