CVE-2026-18677
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Summary
In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Kong Inc. | Kong Mesh | 2.13.0 < 2.13.10 | affected |
| Kong Inc. | Kong Mesh | 2.14.0 < 2.14.2 | affected |
Weaknesses
- CWE-290: CWE-290 Authentication Bypass by Spoofing
Workarounds
Issue workload-bound dataplane tokens for every dataplane whose identity derives from the kuma.io/workload label. A workload-bound token constrains that label to the bound value, so a mismatched label is rejected at authentication.
References
- https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q
- https://github.com/kumahq/kuma/pull/17474
- https://github.com/kumahq/kuma/pull/17503
- https://github.com/kumahq/kuma/pull/17502
- https://developer.konghq.com/mesh/changelog/
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