CVE-2026-42498: CWE-200 Exposure of HTTP Authentication Header to unexpected hosts in Apache Software Foundation Apache Tomcat
CVE-2026-42498 is a vulnerability in Apache Tomcat that causes exposure of the HTTP Authentication Header to unexpected hosts during WebSocket authentication. It affects multiple versions of Apache Tomcat, including 7. 0. 83 through 7. 0. 109, 8. 5. 24 through 8. 5. 100, 9.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42498) in Apache Tomcat involves the unintended exposure of the HTTP Authentication Header to unexpected hosts during the WebSocket authentication process. It affects a wide range of Apache Tomcat versions from 7.0.83 up to 11.0.21. The exposure could potentially leak authentication information to unauthorized parties. The Apache Software Foundation has fixed this issue in versions 11.0.22, 10.1.55, and 9.0.118. There is no CVSS score available, and no known exploitation has been reported to date.
Potential Impact
The vulnerability could lead to unauthorized disclosure of HTTP Authentication Headers during WebSocket authentication, potentially allowing unexpected hosts to receive sensitive authentication information. This could compromise the confidentiality of authentication credentials. However, no known exploits in the wild have been reported so far.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.22, 10.1.55, or 9.0.118, which contain fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation steps are indicated.
CVE-2026-42498: CWE-200 Exposure of HTTP Authentication Header to unexpected hosts in Apache Software Foundation Apache Tomcat
Description
CVE-2026-42498 is a vulnerability in Apache Tomcat that causes exposure of the HTTP Authentication Header to unexpected hosts during WebSocket authentication. It affects multiple versions of Apache Tomcat, including 7. 0. 83 through 7. 0. 109, 8. 5. 24 through 8. 5. 100, 9.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42498) in Apache Tomcat involves the unintended exposure of the HTTP Authentication Header to unexpected hosts during the WebSocket authentication process. It affects a wide range of Apache Tomcat versions from 7.0.83 up to 11.0.21. The exposure could potentially leak authentication information to unauthorized parties. The Apache Software Foundation has fixed this issue in versions 11.0.22, 10.1.55, and 9.0.118. There is no CVSS score available, and no known exploitation has been reported to date.
Potential Impact
The vulnerability could lead to unauthorized disclosure of HTTP Authentication Headers during WebSocket authentication, potentially allowing unexpected hosts to receive sensitive authentication information. This could compromise the confidentiality of authentication credentials. However, no known exploits in the wild have been reported so far.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.22, 10.1.55, or 9.0.118, which contain fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-04-27T22:13:05.647Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a034c88cbff5d8610fea6e9
Added to database: 5/12/2026, 3:51:36 PM
Last enriched: 5/12/2026, 4:06:48 PM
Last updated: 5/12/2026, 6:07:57 PM
Views: 4
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