CVE-2026-42498
Last modified
CVE-2026-42498 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.
Description
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 7.0.0, <= 7.0.109 |
| Apache | Tomcat | >= 8.5.0, <= 8.5.100 |
| Apache | Tomcat | >= 9.0.0, < 9.0.118 |
| Apache | Tomcat | >= 10.1.0, < 10.1.55 |
| Apache | Tomcat | >= 11.0.0, < 11.0.22 |
References
- https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdbMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/12/14Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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