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Advisory severityHigh8.2Red Hat Linux

High [CVE-2026-68569] Improper Authentication due to principal lookup failure

This high-severity Red Hat Linux advisory covers CVE-2026-68569 affecting Red Hat JBoss Web Server 6.2.5, Red Hat JBoss Web Server 6.2 on RHEL 10, Red Hat JBoss Web Server 6.2 on RHEL 8.

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CVE-2026-68569 Source published Source updated

VulniPulse record published Record updated

CVE-2026-68569
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

This can lead to unauthorized access to the system. This Important vulnerability in Apache Tomcat allows unauthorized access when configured with CLIENT-CERT or SPNEGO authentication alongside a DataSourceRealm.

This flaw could permit a user to be authenticated even if their account does not exist, bypassing intended security controls in Red Hat deployments where these specific configurations are in use. Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N).

Weakness: CWE-305.

Affected products named by the advisory: Red Hat JBoss Web Server 6.2.5; 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; and 11 more.

Affected versions
  • 11.0.0
  • 11.0.24
  • 10.1.0
  • 10.1.57
  • 9.0.0
  • 9.0.120
  • 8.5.0
  • 8.5.100
  • 7.0.0
  • 7.0.109

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

Fixed versions
  • 11.0.25
  • 10.1.58
  • 9.0.121
  • tomcat
  • jws6-tomcat-0:10.1.49-16.redhat_00016.1.el10jws
  • jws6-tomcat-0:10.1.49-16.redhat_00016.1.el8jws
  • jws6-tomcat-0:10.1.49-16.redhat_00016.1.el9jws
  • tomcat10-main-10.1.60-0.1.hum1
  • tomcat11-main-11.0.26-0.1.hum1
  • RHSA-2026:73982
  • RHSA-2026:73981
  • RHSA-2026:68257
  • RHSA-2026:68258

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • To mitigate this issue, avoid using CLIENT-CERT or SPNEGO authentication methods with the DataSourceRealm in Apache Tomcat. Alternatively, restrict network access to the Apache Tomcat instance to trusted clients only, thereby limiting exposure to potential attackers. If changes are made to the Tomcat configuration, a service restart may be required for the changes to take effect.

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

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