Description
Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second.



This issue affects Apache Tomcat: from 11.0.0-M25 through 11.0.26.



Users are recommended to upgrade to version 11.0.27, which fixes the issue.
Published: 2026-10-20
Score: 9.1 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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History

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

Type Values Removed Values Added
References

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 16:30:00 +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:N/A:H'}

ssvc

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


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

Type Values Removed Values Added
Description Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second. This issue affects Apache Tomcat: from 11.0.0-M25 through 11.0.26. Users are recommended to upgrade to version 11.0.27, which fixes the issue.
Title Apache Tomcat: AJP response mix-up
Weaknesses CWE-127
References

Subscriptions

Apache Apache Tomcat Tomcat
Apache Software Foundation Tomcat
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-20T18:09:52.183Z

Reserved: 2026-09-30T06:39:52.124Z

Link: CVE-2026-103119

cve-icon Vulnrichment

Updated: 2026-10-20T15:40:57.103Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T14:16:56.087

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

Link: CVE-2026-103119

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T18:15:14Z

Weaknesses