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CVE-2026-42498

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CVE-2026-42498

Published: May 12, 2026

Modified: May 13, 2026

PUBLISHED

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.

VendorProductVersions

Apache Software Foundation

Apache Tomcat

affected
11.0.0-M1 - <= 11.0.21
affected
10.1.0-M1 - <= 10.1.54
affected
9.0.2 - <= 9.0.117
affected
8.5.24 - <= 8.5.100
affected
7.0.83 - <= 7.0.109

Weaknesses (CWE)

CWE-200

References

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