CVE-2026-86246

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol	Vendor Advisory Mailing List
http://www.openwall.com/lists/oss-security/2026/09/23/32	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat_native::::::::
	cpe:2.3:a:apache:tomcat_native::::::::

History

06 Oct 2026, 13:50

Type	Values Removed	Values Added
First Time		Apache Apache tomcat Native
References	~~() https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol -~~	() https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol - Vendor Advisory, Mailing List
References	~~() http://www.openwall.com/lists/oss-security/2026/09/23/32 -~~	() http://www.openwall.com/lists/oss-security/2026/09/23/32 - Mailing List, Third Party Advisory
CPE		cpe:2.3:a:apache:tomcat_native::::::::

23 Sep 2026, 19:19

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/09/23/32 -

23 Sep 2026, 16:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1

23 Sep 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 13:17

Updated : 2026-10-06 13:50

NVD link : CVE-2026-86246

Mitre link : CVE-2026-86246

CVE.ORG link : CVE-2026-86246

JSON object : View

Products Affected

apache

tomcat_native

CWE

CWE-1188

Initialization of a Resource with an Insecure Default

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