[SECURITY] CVE-2026-34486 Apache Tomcat - Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

Mark Thomas <[email protected]> Thu, 9 Apr 2026 20:03:32 +0100
Newsgroups gmane.comp.jakarta.tomcat.user,gmane.comp.apache.maven.announce,gmane.comp.apache.maven.announce,gmane.comp.clustering.spark.livy.devel
Message-ID <[email protected]>
CVE-2026-34486 Apache Tomcat - Fix for CVE-2026-29146 allowed bypass of 
EncryptInterceptor

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 11.0.20
Apache Tomcat 10.1.53
Apache Tomcat 9.0.116

Description:
An error in the fix for CVE-2026-29146 allowed the EncryptInterceptor to 
be bypassed.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.21 or later
- Upgrade to Apache Tomcat 10.1.54 or later
- Upgrade to Apache Tomcat 9.0.117 or later

Credit:
This issue was identified by Bartlomiej Dmitruk, striga.ai

History:
2026-04-09 Original advisory

References:
[1] https://tomcat.apache.org/security-11.html
[2] https://tomcat.apache.org/security-10.html
[3] https://tomcat.apache.org/security-9.html