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.
Affected products
apache: tomcat
References2
- lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb Mailing ListVendor Advisory
- www.openwall.com/lists/oss-security/2026/05/12/14 Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EPSS — exploit probability
- 1% percentile: 53 · as of 14 November 2026
- CWE
- CWE-200
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