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Kubernetes CVE-2026-34487

| EUVDEUVD-2026-21057 HIGH
Insertion of Sensitive Information into Log File (CWE-532)
2026-04-09 apache GHSA-x4m4-345f-5h5g
Apache Kubernetes Tomcat Information Disclosure Red Hat Suse
High
Disputed · 7.5 NVD
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Severity by source

Sources disagree (Low–High)
NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SUSE
HIGH
qualitative
Red Hat
6.5 LOW
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch released
Apr 11, 2026 - 02:30 nvd
Patch available
EUVD ID Assigned
Apr 09, 2026 - 20:15 euvd
EUVD-2026-21057
Analysis Generated
Apr 09, 2026 - 20:15 vuln.today
CVE Published
Apr 09, 2026 - 19:36 nvd
HIGH 7.5

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 442 maven packages depend on org.apache.tomcat.embed:tomcat-embed-core (33 direct, 409 indirect)
  • 20 maven packages depend on org.apache.tomcat:tomcat-catalina (8 direct, 12 indirect)
  • 9 maven packages depend on org.apache.tomcat:tomcat-tribes (3 direct, 6 indirect)

Ecosystem-wide dependent count for version 9.0.13 and other introduced versions.

DescriptionCVE.org

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.

AnalysisAI

Apache Tomcat's cloud membership clustering component logs Kubernetes bearer tokens in plaintext, enabling unauthenticated remote attackers to extract authentication credentials from log files. Affects Tomcat 9.0.13-9.0.116, 10.1.0-M1-10.1.53, and 11.0.0-M1-11.0.20. CVSS 7.5 (High) reflects confidentiality impact; no public exploit identified at time of analysis. Exploitation requires network access to log files or log aggregation systems, potentially enabling privilege escalation within Kubernetes clusters.

Technical ContextAI

CWE-532 violation in cloud membership clustering module writes Kubernetes bearer tokens to application logs without sanitization. CVSS vector PR:N indicates unauthenticated exploitation possible if log files accessible via exposed endpoints, misconfigured log shipping, or shared storage. CPE anchored to Apache Software Foundation's Tomcat product family across 9.x, 10.x, 11.x branches.

RemediationAI

Vendor-released patch: upgrade to Apache Tomcat 11.0.21, 10.1.54, or 9.0.117, which eliminate bearer token logging in clustering components. Mitigation steps: restrict filesystem and network access to Tomcat log directories; rotate exposed Kubernetes bearer tokens immediately; audit log aggregation pipelines for leaked credentials; disable cloud membership clustering if not operationally required. Consult official Apache advisory at https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h for additional security guidance. EPSS 0.02% indicates low observed exploitation activity.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

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CVE-2026-34487 vulnerability details – vuln.today
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