Bug 2556182 (CVE-2026-88041)

Summary: CVE-2026-88041 tomcat: tomcat: Information disclosure via incomplete HTTP trailer cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: csutherl, dsoumis, jclere, jwon, pjindal, plodge, rhel-process-autobot, rmaucher, szappis, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Apache Tomcat. Due to an incomplete cleanup vulnerability, HTTP (Hypertext Transfer Protocol) trailer headers from a previous request can persist and leak into a subsequent request processed on the same connection. This issue may allow a remote user to access sensitive request data belonging to another client, resulting in information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2558357, 2558358, 2558359    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-20 13:51:50 UTC 
Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.



This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122.



Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.