CVE-2026-34487
HIGH
Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File
Published April 9, 2026Updated August 12, 2026Source: osv
Summary
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.
Remediation
Upgrade to the fixed version using your package manager.
Maven
Update org.apache.tomcat:tomcat-tribes to 11.0.21 or later<!-- Update pom.xml dependency version to 11.0.21 for org.apache.tomcat:tomcat-tribes -->
Maven
Update org.apache.tomcat:tomcat to 11.0.21 or later<!-- Update pom.xml dependency version to 11.0.21 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 11.0.21 or later<!-- Update pom.xml dependency version to 11.0.21 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat to 10.1.54 or later<!-- Update pom.xml dependency version to 10.1.54 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat:tomcat-tribes to 9.0.117 or later<!-- Update pom.xml dependency version to 9.0.117 for org.apache.tomcat:tomcat-tribes -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 10.1.54 or later<!-- Update pom.xml dependency version to 10.1.54 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 9.0.117 or later<!-- Update pom.xml dependency version to 9.0.117 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat to 9.0.117 or later<!-- Update pom.xml dependency version to 9.0.117 for org.apache.tomcat:tomcat -->
Maven
Update org.apache.tomcat:tomcat-tribes to 10.1.54 or later<!-- Update pom.xml dependency version to 10.1.54 for org.apache.tomcat:tomcat-tribes -->
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (9)
| Package | Ecosystem | Affected | Fixed In |
|---|---|---|---|
| org.apache.tomcat:tomcat-tribes | maven | 11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+37 more) | 11.0.21 |
| org.apache.tomcat:tomcat | maven | 11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+37 more) | 11.0.21 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 11.0.0, 11.0.0-M1, 11.0.0-M10, 11.0.0-M11 (+37 more) | 11.0.21 |
| org.apache.tomcat:tomcat | maven | 10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+56 more) | 10.1.54 |
| org.apache.tomcat:tomcat-tribes | maven | 9.0.100, 9.0.102, 9.0.104, 9.0.105 (+82 more) | 9.0.117 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+56 more) | 10.1.54 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 9.0.100, 9.0.102, 9.0.104, 9.0.105 (+82 more) | 9.0.117 |
| org.apache.tomcat:tomcat | maven | 9.0.100, 9.0.102, 9.0.104, 9.0.105 (+82 more) | 9.0.117 |
| org.apache.tomcat:tomcat-tribes | maven | 10.1.0, 10.1.0-M1, 10.1.0-M10, 10.1.0-M11 (+56 more) | 10.1.54 |
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-532
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-34487ADVISORY
- https://github.com/apache/tomcat/commit/301bc6efbf72feb14dacfdfa3f50372182736150WEB
- https://github.com/apache/tomcat/commit/5eff2a773b8b728083e5195b3183df1b9e12a03dWEB
- https://github.com/apache/tomcat/commit/f593292a082e5ef9336a8db2b4b522f7f3e36976WEB
- https://github.com/apache/tomcatPACKAGE
- https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850hWEB
- https://tomcat.apache.org/security-10.htmlWEB
- https://tomcat.apache.org/security-11.htmlWEB
- https://tomcat.apache.org/security-9.htmlWEB
- https://www.openwall.com/lists/oss-security/2026/04/09/28WEB
Frequently Asked Questions
- What is CVE-2026-34487?
- Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
- How do I check if my project is affected by CVE-2026-34487?
- CVE-2026-34487 affects org.apache.tomcat:tomcat-tribes, org.apache.tomcat:tomcat and org.apache.tomcat.embed:tomcat-embed-core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-34487 and 200,000+ other known vulnerabilities.
Severity & Exploitability
CVSS Score
7.5
High exploitability or significant impact. Prioritize remediation within days.
Also Known As
GHSA-x4m4-345f-5h5g
BIT-tomcat-2026-34487
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