CVE-2026-29146 Apache Tomcat - EncryptInterceptor vulnerable to padding
oracle attack by default
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 11.0.0-M1 to 11.0.18
Apache Tomcat 10.1.0-M1 to 10.1.52
Apache Tomcat 9.0.13 to 9.0.115
Older, EOS versions may also be affected
Description:
The EncryptInterceptor used CBC by default which is vulnerable to a
padding Oracle attack.
Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.20 or later
- Upgrade to Apache Tomcat 10.1.53 or later
- Upgrade to Apache Tomcat 9.0.116 or later
Credit:
This issue was identified by Uri Katz and Avi Lumelsky (Oligo Security)
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
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
