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CVE-2026-34487EXPLOITEDPATCHED
apache · tomcat

Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token

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.

Affected Products

VendorProductVersions
apachetomcat11.0.0-M1, 10.1.0-M1, 9.0.13

References

  • https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h(vendor-advisory)

Related News (2 articles)

Tier C
oss-security6h ago
CVE-2026-34487: Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
→ No new info (linked only)
Tier C
VulDB9h ago
CVE-2026-34487 | Apache Tomcat up to 9.0.116/10.1.53/11.0.20 Bearer Token log file
→ No new info (linked only)
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850h
CWECWE-532
PublishedApr 9, 2026
Last enriched6h agov3
Trending Score51
Source articles2
Independent2
Info Completeness9/14
Missing: cvss, epss, kev, iocs, mitre_attack

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 9, 2026
Discovered by ZDM
Apr 9, 2026
Updated: description, severity
Apr 9, 2026
Actively Exploited
Apr 9, 2026
Exploit Available
Apr 9, 2026
Patch Available
Apr 9, 2026
Updated: severity, exploitAvailable, activelyExploited
Apr 9, 2026

Version History

v3
Last enriched 6h ago
v3Tier C6h ago

Updated severity to LOW, marked exploit as available and actively exploited, and set patchAvailable to null.

severityexploitAvailableactivelyExploited
via oss-security
v2Tier C9h ago

Updated description with new details, changed severity to HIGH, and noted that no exploit exists.

descriptionseverity
via VulDB
v19h ago

Initial creation