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.
Published: 2026-10-20
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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History

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

Subscriptions

Apache Apache Tomcat Tomcat
Apache Software Foundation Tomcat
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

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-101356

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T17:45:13Z

Weaknesses