Description
Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.



This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.



Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.
Published: 2026-09-23
Score: 7.5 High
EPSS: n/a
KEV: No
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Remediation

No vendor fix or workaround currently provided.

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History

Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

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


Wed, 23 Sep 2026 16:00:00 +0000

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

Wed, 23 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected. Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.
Title Apache Tomcat Native: DoS via TLS handshake
Weaknesses CWE-126
References

Subscriptions

Apache Apache Tomcat
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-23T15:29:11.463Z

Reserved: 2026-09-06T09:21:33.313Z

Link: CVE-2026-86243

cve-icon Vulnrichment

Updated: 2026-09-23T15:29:07.243Z

cve-icon NVD

Status : Received

Published: 2026-09-23T13:17:30.993

Modified: 2026-09-23T16:16:46.277

Link: CVE-2026-86243

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T15:36:47Z

Weaknesses