CVE-2026-11876

Medium

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.

SeverityMedium

CVSS5.0

Exploit probability—

ProductZenml-io/zenml

PublishedJul 21, 2026

First seenJul 21, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

zenml-io zenml-io/zenml0.95.0 or later

Affected products

Product	Affected versions	Fixed in
zenml-io zenml-io/zenml	v < 0.95.0	0.95.0

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