CVE-2026-34487
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Tomcat
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-532CWE-532
How to fix
Update
- apache tomcat9.0.117, 10.1.54, 11.0.21 or later
- org.apache.tomcat:tomcat-tribes9.0.117, 10.1.54, 11.0.21 or later
- org.apache.tomcat:tomcat9.0.117, 10.1.54, 11.0.21 or later
- org.apache.tomcat.embed:tomcat-embed-core9.0.117, 10.1.54, 11.0.21 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 9.0.13 ≤ v < 9.0.117, 10.1.0 ≤ v < 10.1.54, 11.0.0 ≤ v < 11.0.21 | 9.0.117, 10.1.54, 11.0.21 |
| org.apache.tomcat:tomcat-tribesMaven | 9.0.13 ≤ v < 9.0.117, 10.1.0-M1 ≤ v < 10.1.54, 11.0.0-M1 ≤ v < 11.0.21 | 9.0.117, 10.1.54, 11.0.21 |
| org.apache.tomcat:tomcatMaven | 9.0.13 ≤ v < 9.0.117, 10.1.0-M1 ≤ v < 10.1.54, 11.0.0-M1 ≤ v < 11.0.21 | 9.0.117, 10.1.54, 11.0.21 |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 9.0.13 ≤ v < 9.0.117, 10.1.0-M1 ≤ v < 10.1.54, 11.0.0-M1 ≤ v < 11.0.21 | 9.0.117, 10.1.54, 11.0.21 |
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