CVE-2026-34487: Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File

April 9, 2026 (updated April 10, 2026)

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.

References

github.com/advisories/GHSA-x4m4-345f-5h5g
github.com/apache/tomcat
lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h
nvd.nist.gov/vuln/detail/CVE-2026-34487

Code Behaviors & Features

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