Vulnerability · Published Jul 21, 2026 · Assigned by @huntr_ai
CVE-2026-11876Missing Authorization in get_deployed_stack Endpoint in zenml-io/zenml
Medium 5.0
In plain English
A medium-severity missing authorization in zenml-io/zenml from zenml-io. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Official description
In zenml-io/zenml version 0.94.2, the `GET /api/v1/stack-deployment/stack` endpoint (`get_deployed_stack`) lacks proper RBAC authorization checks, allowing any authenticated user to enumerate all deployed stacks across all users and tenants. This includes stack component details, service connector information, and user IDs of stack owners. The vulnerability arises from two issues: missing endpoint-level RBAC checks and the use of a server-side `Client()` that bypasses the RBAC enforcement layer by directly accessing the database through `SqlZenStore`. This exposes sensitive information such as infrastructure topology, service connector details, stack ownership, and deployment metadata, potentially enabling cross-tenant reconnaissance and further attacks in multi-tenant ZenML Pro/Cloud deployments.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| zenml-io | zenml-io/zenml | unspecified – before 0.95.0 |
Weakness: CWE-862 · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N