HIGHCVE-2026-42498Published Modified CNA apache
CVE-2026-42498: Apache Tomcat: WebSocket authentication header exposure
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 v3.1
- 7.3
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- Apache Software Foundation / Apache Tomcat≤ 11.0.21 · ≤ 10.1.54 · ≤ 9.0.117 · ≤ 8.5.100 · ≤ 7.0.109
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LReferences