Bug 2524155 (CVE-2026-65637) - CVE-2026-65637 tomcat: Apache Tomcat: Improper Input Validation allows HTTP/2 no-authority bypass of strict SNI validation
Summary: CVE-2026-65637 tomcat: Apache Tomcat: Improper Input Validation allows HTTP/2...
Keywords:
Status: NEW
Alias: CVE-2026-65637
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-25 22:02 UTC by OSIDB Bzimport
Modified: 2026-10-07 13:32 UTC (History)
10 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-2026:76952 0 None None None 2026-10-07 13:32:32 UTC
Red Hat Product Errata RHSA-2026:76956 0 None None None 2026-10-07 13:31:08 UTC

Description OSIDB Bzimport 2026-08-25 22:02:04 UTC 
Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990.



This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120.



Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Comment 5 Jon Orris 2026-10-07 13:31:07 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 7.0.2

Via RHSA-2026:76956 https://access.redhat.com/errata/RHSA-2026:76956
Comment 6 Jon Orris 2026-10-07 13:32:31 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-2026:76952 https://access.redhat.com/errata/RHSA-2026:76952
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