CVE-2026-86243

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

23/09/2026

Last modified:

06/10/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:apache:tomcat_native::::::::	1.3.0 (including)	1.3.9 (excluding)
cpe:2.3:a:apache:tomcat_native::::::::	2.0.0 (including)	2.0.16 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-86243

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools