CVE-2026-18676
Published:August 12, 2026
Updated:September 01, 2026
The default kuma-cp configuration in Kong Mesh reveals the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. Due to a CORS misconfiguration a cross-origin fetch() from a malicious page returns the admin JWT and signing material.
Affected Packages
https://github.com/kumahq/kuma.git (GITHUB):
Affected version(s) >=v2.12.4 <v2.12.10Fix Suggestion:
Update to version v2.12.10https://github.com/kumahq/kuma.git (GITHUB):
Affected version(s) >=v2.7.20 <v2.7.25Fix Suggestion:
Update to version v2.7.25https://github.com/kumahq/kuma.git (GITHUB):
Affected version(s) >=v2.13.0 <v2.13.5Fix Suggestion:
Update to version v2.13.5https://github.com/kumahq/kuma.git (GITHUB):
Affected version(s) >=v2.11.8 <v2.11.13Fix Suggestion:
Update to version v2.11.13Related Resources (13)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.23