CVE-2026-86246
Published:September 23, 2026
Updated:October 13, 2026
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.
Affected Packages
https://github.com/apache/tomcat-native.git (GITHUB):
Affected version(s) >=1.3.0 <1.3.9Fix Suggestion:
Update to version 1.3.9https://github.com/apache/tomcat-native.git (GITHUB):
Affected version(s) >=2.0.0 <2.0.16Fix Suggestion:
Update to version 2.0.16Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Initialization of a Resource with an Insecure Default
EPSS
Base Score:
0.36