CVE-2026-42498
Apache Tomcat: WebSocket authentication header exposure
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
7th
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.
| CWE | CWE-200 |
| Vendor | apache software foundation |
| Product | apache tomcat |
| Published | May 12, 2026 |
| Last Updated | May 13, 2026 |
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Affected Versions
Apache Software Foundation / Apache Tomcat
11.0.0-M1 ≤ 11.0.21 10.1.0-M1 ≤ 10.1.54 9.0.2 ≤ 9.0.117 8.5.24 ≤ 8.5.100 7.0.83 ≤ 7.0.109
References
Credits
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