CVE-2026-18676: CWE-346 Origin Validation Error in Kong Inc. Kong Mesh
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.
CVE-2026-18676: CWE-346 Origin Validation Error in Kong Inc. Kong Mesh
Description
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.
CVSS v4.0
Score 5.1medium
Affected software
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Kong
- Date Reserved
- 2026-08-03T15:20:44.526Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7cc1f3bf8831d539fe73ec
Added to database: 08/12/2026, 18:56:51 UTC
Last updated: 08/12/2026, 18:56:51 UTC
Views: 1
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