CVE-2026-34487 (High) detected in tomcat-embed-core-9.0.34.jar

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CVE-2026-34487 - High Severity Vulnerability

Vulnerable Library - tomcat-embed-core-9.0.34.jar

Core Tomcat implementation

Library home page: https://tomcat.apache.org/

Path to dependency file: /dd-smoke-tests/springboot-openliberty/application/pom.xml

Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.34/tomcat-embed-core-9.0.34.jar

Dependency Hierarchy:

• spring-boot-starter-web-2.2.7.RELEASE.jar (Root Library)
  • spring-boot-starter-tomcat-2.2.7.RELEASE.jar
    • ❌ tomcat-embed-core-9.0.34.jar (Vulnerable Library)

Found in HEAD commit: 2819174635979a19573ec0ce8e3e2b63a3848079

Found in base branch: master

Vulnerability Details

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.

Publish Date: 2026-04-09

URL: CVE-2026-34487

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-04-09

Fix Resolution (org.apache.tomcat.embed:tomcat-embed-core): 9.0.117

Direct dependency fix Resolution (org.springframework.boot:spring-boot-starter-web): 3.0.0

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