CVE-2026-42498

Published: May 12, 2026Modified: Jun 17, 2026

7.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploitability: 3.9 / Impact: 3.4

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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 (5)

Products: Apache: Tomcat

Apache

1 product

Tomcat

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Apache Tomcat	From 10.1.0 to 10.1.55
Apache Tomcat	From 11.0.0 to 11.0.22
Apache Tomcat	From 7.0.0 to 7.0.109
Apache Tomcat	From 8.5.0 to 8.5.100
Apache Tomcat	From 9.0.0 to 9.0.118

Related CWEs

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

References (2)

https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb

Source: security@apache.org

Mailing ListVendor Advisory

http://www.openwall.com/lists/oss-security/2026/05/12/14

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.