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CVE-2026-86246 Details

Description

Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options by default including ALLOW_CLIENT_RENEGOTIATION, NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and ALLOW_NO_DHE_KEX. 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 2.0.16 or 1.3.9, which fix the issue.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://www.openwall.com/lists/oss-security/2026/09/23/32	CVE	Mailing ListThird Party Advisory
https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol	[email protected]	Vendor AdvisoryMailing List

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1188	Initialization of a Resource with an Insecure Default	[email protected]

Affected Products

Product	Versions
apache tomcat native	>= 1.3.0, < 1.3.9 >= 2.0.0, < 2.0.16
CPE cpe:2.3:a:apache:tomcat_native:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Oct 6, 2026	Initial Analysis	[email protected]
Sep 23, 2026	CVE Modified	CVE
Sep 23, 2026	CVE Modified	CISA-ADP
Sep 23, 2026	New CVE Received	[email protected]