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.

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History

Wed, 21 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-488
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 20 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-754

Tue, 20 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache apache Tomcat
Apache tomcat
Apache Software Foundation
Apache Software Foundation tomcat
Vendors & Products Apache
Apache apache Tomcat
Apache tomcat
Apache Software Foundation
Apache Software Foundation tomcat

Tue, 20 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Apache Tomcat: HTTP/2 request/response mix-up after error during async processing
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-20T18:17:42.030Z

Reserved: 2026-09-28T15:30:32.593Z

Link: CVE-2026-101356

cve-icon Vulnrichment

Updated: 2026-10-20T18:09:51.253Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T14:16:55.767

Modified: 2026-10-20T19:35:38.940

Link: CVE-2026-101356

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T13:46:50Z

Links: CVE-2026-101356 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T20:45:14Z