Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.



This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.



Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Advisories

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Fixes

Solution

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Workaround

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History

Wed, 23 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

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

ssvc

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


Wed, 23 Sep 2026 14:00:00 +0000

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

Wed, 23 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Description Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Title Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up
Weaknesses CWE-444
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-23T16:17:11.408Z

Reserved: 2026-09-07T09:49:48.382Z

Link: CVE-2026-86350

cve-icon Vulnrichment

Updated: 2026-09-23T16:16:39.762Z

cve-icon NVD

Status : Received

Published: 2026-09-23T12:17:08.350

Modified: 2026-09-23T17:17:17.933

Link: CVE-2026-86350

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T13:45:04Z

Weaknesses