Bug 2558429

Summary:	CVE-2026-101356 tomcat: tomcat: Information disclosure via incorrect object recycling in HTTP/2 processing [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Joel Chamberlain <jochambe>
Component:	tomcat	Assignee:	Dimitris Soumis <dsoumis>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	akrajcik, csutherl, dsoumis, ivan.afonichev, java-sig-commits, szappis
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["7c0c92e2-8cc0-47f6-a06d-9883c0f41469"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2556186

Description Joel Chamberlain 2026-10-21 18:01:57 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users.



This issue affects Apache Tomcat: from 11.0.22 through 11.0.26, from 10.1.55 through 10.1.60, from 9.0.118 through 9.0.122.



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