Bug 2476516 (CVE-2026-42498) - CVE-2026-42498 tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication.
Summary: CVE-2026-42498 tomcat-coyote: Apache Tomcat: Information disclosure due to HT...
Keywords:
Status: NEW
Alias: CVE-2026-42498
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2488250 2488251 2488253
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-12 16:02 UTC by OSIDB Bzimport
Modified: 2026-07-14 16:11 UTC (History)
61 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:39188 0 None None None 2026-07-14 16:11:47 UTC
Red Hat Product Errata RHSA-2026:39189 0 None None None 2026-07-14 16:08:53 UTC

Description OSIDB Bzimport 2026-05-12 16:02:01 UTC 
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.
Comment 2 errata-xmlrpc 2026-07-14 16:08:49 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 7.0.0

Via RHSA-2026:39189 https://access.redhat.com/errata/RHSA-2026:39189
Comment 3 errata-xmlrpc 2026-07-14 16:11:44 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 7.0 on RHEL 10
  Red Hat JBoss Web Server 7.0 on RHEL 8
  Red Hat JBoss Web Server 7.0 on RHEL 9

Via RHSA-2026:39188 https://access.redhat.com/errata/RHSA-2026:39188
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