CVE-2026-18676

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

No CVSS.

References

Link	Resource
https://developer.konghq.com/mesh/changelog/
https://github.com/kumahq/kuma/pull/16416
https://github.com/kumahq/kuma/pull/16423
https://github.com/kumahq/kuma/pull/16424
https://github.com/kumahq/kuma/pull/16425
https://github.com/kumahq/kuma/pull/16426
https://github.com/kumahq/kuma/pull/16427
https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2

Configurations

No configuration.

History

23 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) La configuración predeterminada de kuma-cp en Kong Mesh revela el token de arranque de administrador y las claves de firma a cualquier página web que el operador visita mientras el plano de control es accesible desde su navegador. Debido a una configuración incorrecta de CORS, una llamada fetch() de origen cruzado desde una página maliciosa devuelve el JWT de administrador y el material de firma.

Information

Published : 2026-08-12 19:17

Updated : 2026-10-23 19:10

NVD link : CVE-2026-18676

Mitre link : CVE-2026-18676

CVE.ORG link : CVE-2026-18676

JSON object : View

Products Affected

No product.

CWE

CWE-346

Origin Validation Error

CWE-942

Permissive Cross-domain Security Policy with Untrusted Domains

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