CVE-2026-34487
Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
7.5
HIGH
CVSS 3.1
EPSS 0.45%
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 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.
How to fix CVE-2026-34487
To remediate CVE-2026-34487, upgrade the affected package to a fixed version below.
- —upgrade to 9.0.117 or later
- —upgrade to 10.1.55-1~deb12u1 or later
- —upgrade to 11.0.22-1~deb13u1 or later
- —upgrade to 9.0.118-0+deb11u1 or later
- —upgrade to 9.0.117 or later
- —upgrade to 9.0.117 or later
Is CVE-2026-34487 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- >= 9.0.13, < 9.0.117, >= 10.1.0, < 10.1.54, >= 11.0.0, < 11.0.21
- from 0, < 10.1.55-1~deb12u1
- from 0, < 11.0.22-1~deb13u1
- from 0, < 9.0.118-0+deb11u1
- >= 9.0.13, < 9.0.117
- >= 9.0.13, < 9.0.117
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |