Kubeflow Model Registry through 0.3.17 contains a server-side request forgery vulnerability that allows namespace users to steal the controller ServiceAccount token via the modelregistry.kubeflow.org/url annotation. Attackers can create an InferenceService pointing the annotation at their server, capture the bearer token, and modify other tenants' InferenceServices cluster-wide.
https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/kubeflow-hub-controller-token-url-forwarding
https://github.com/kubeflow/hub/blob/v0.3.17/pkg/openapi/client.go#L420-L423
https://github.com/kubeflow/hub/blob/v0.3.17/pkg/inferenceservice-controller/controller.go#L268-L292
https://github.com/kubeflow/hub/blob/v0.3.17/cmd/controller/main.go#L224-L228
Published: 2026-10-13
Updated: 2026-10-26
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:C/A:N
Severity: High
Base Score: 7.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Severity: High
Base Score: 7.1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Severity: High
EPSS: 0.00347