CVE-2026-34487

Insertion of Sensitive Information into Log File vulnerability in the cloud membership for clustering component of Apache Tomcat exposed the Kubernetes bearer token. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.13 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@apache.org

Published

2026-04-09

Last modified

2026-10-26

Weaknesses

CWE-532

Affected products

• Tomcat (Apache)
• Apache Tomcat (Apache Software Foundation)

References

• https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h
• http://www.openwall.com/lists/oss-security/2026/04/09/28