Bug 2539354 (CVE-2026-75973) - CVE-2026-75973 tomcat: Apache Tomcat: Cross-context authentication mix-up via Jakarta Authentication misconfiguration
Summary: CVE-2026-75973 tomcat: Apache Tomcat: Cross-context authentication mix-up via...
Keywords:
Status: NEW
Alias: CVE-2026-75973
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2543044
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-23 11:33 UTC by OSIDB Bzimport
Modified: 2026-09-29 10:06 UTC (History)
10 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-23 11:33:12 UTC 
Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.



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. Other unsupported versions may also be affected.




Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.
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