Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
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 through 11.0.20, from 10.1.0 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.
02 / AFFECTED SOFTWARE
Affected packages
187 explicit affected versions
187 explicit affected versions
187 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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 through 11.0.20, from 10.1.0 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.
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.
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.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2026/04/09/28
- https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h
- https://nvd.nist.gov/vuln/detail/CVE-2026-34487
- https://github.com/apache/tomcat
- https://github.com/apache/tomcat/commit/301bc6efbf72feb14dacfdfa3f50372182736150
- https://github.com/apache/tomcat/commit/5eff2a773b8b728083e5195b3183df1b9e12a03d
- https://github.com/apache/tomcat/commit/f593292a082e5ef9336a8db2b4b522f7f3e36976
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34487.json