Vulnerability Description
When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy admin API to any caller that can reach the port, with no authentication. An attacker with network access to a data plane's port 9902, for example another pod on the cluster network, can read Envoy and data plane configuration without credentials: config dumps, cluster and listener lists, stats, and the mesh trust bundle. Exposure is read-only - destructive Envoy admin actions are blocked and private keys are not exposed.
Related Weaknesses (CWE)
References
- https://developer.konghq.com/mesh/changelog/
- https://github.com/kumahq/kuma/pull/17317
- https://github.com/kumahq/kuma/pull/17418
- https://github.com/kumahq/kuma/security/advisories/GHSA-r9pv-x3pm-4r2w
FAQ
What is CVE-2026-18673?
CVE-2026-18673 is a documented vulnerability. When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy a...
How severe is CVE-2026-18673?
CVSS scoring is not yet available for CVE-2026-18673. Check NVD for updates.
Is there a patch for CVE-2026-18673?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.