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: 2026-09-21 10:42 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
Red Hat Product Errata RHSA-2026:43401 0 None None None 2026-07-22 12:23:46 UTC
Red Hat Product Errata RHSA-2026:43402 0 None None None 2026-07-22 12:22:58 UTC
Red Hat Product Errata RHSA-2026:67163 0 None None None 2026-09-14 13:35:17 UTC
Red Hat Product Errata RHSA-2026:67164 0 None None None 2026-09-14 13:35:05 UTC
Red Hat Product Errata RHSA-2026:68651 0 None None None 2026-09-18 09:04:46 UTC
Red Hat Product Errata RHSA-2026:68659 0 None None None 2026-09-17 14:21:20 UTC
Red Hat Product Errata RHSA-2026:68660 0 None None None 2026-09-17 14:40:18 UTC
Red Hat Product Errata RHSA-2026:68677 0 None None None 2026-09-17 15:03:20 UTC
Red Hat Product Errata RHSA-2026:68678 0 None None None 2026-09-17 14:33:01 UTC
Red Hat Product Errata RHSA-2026:68679 0 None None None 2026-09-17 14:36:18 UTC
Red Hat Product Errata RHSA-2026:68680 0 None None None 2026-09-17 14:39:07 UTC
Red Hat Product Errata RHSA-2026:69259 0 None None None 2026-09-21 10:42:18 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
Comment 4 errata-xmlrpc 2026-07-22 12:22:55 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 6.2.4

Via RHSA-2026:43402 https://access.redhat.com/errata/RHSA-2026:43402
Comment 5 errata-xmlrpc 2026-07-22 12:23:42 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 6.2 on RHEL 10
  Red Hat JBoss Web Server 6.2 on RHEL 8
  Red Hat JBoss Web Server 6.2 on RHEL 9

Via RHSA-2026:43401 https://access.redhat.com/errata/RHSA-2026:43401
Comment 7 Jon Orris 2026-09-14 13:35:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:67164 https://access.redhat.com/errata/RHSA-2026:67164
Comment 8 Jon Orris 2026-09-14 13:35:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:67163 https://access.redhat.com/errata/RHSA-2026:67163
Comment 9 Jon Orris 2026-09-17 14:21:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:68659 https://access.redhat.com/errata/RHSA-2026:68659
Comment 10 Jon Orris 2026-09-17 14:32:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:68678 https://access.redhat.com/errata/RHSA-2026:68678
Comment 11 Jon Orris 2026-09-17 14:36:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:68679 https://access.redhat.com/errata/RHSA-2026:68679
Comment 12 Jon Orris 2026-09-17 14:39:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:68680 https://access.redhat.com/errata/RHSA-2026:68680
Comment 13 Jon Orris 2026-09-17 14:40:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:68660 https://access.redhat.com/errata/RHSA-2026:68660
Comment 14 Jon Orris 2026-09-17 15:03:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:68677 https://access.redhat.com/errata/RHSA-2026:68677
Comment 15 Jon Orris 2026-09-18 09:04:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:68651 https://access.redhat.com/errata/RHSA-2026:68651
Comment 16 Jon Orris 2026-09-21 10:42:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:69259 https://access.redhat.com/errata/RHSA-2026:69259
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