[SECURITY] CVE-2026-29146 Apache Tomcat - EncryptInterceptor vulnerable to padding oracle attack by default
Mark Thomas <[email protected]> Thu, 9 Apr 2026 20:03:24 +0100
| Newsgroups | gmane.comp.jakarta.tomcat.user,gmane.comp.apache.maven.announce,gmane.comp.apache.maven.announce,gmane.comp.apache.deltacloud.devel |
|---|---|
| Message-ID | <[email protected]> |
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