Vulnerability · Published Oct 30, 2026 · Assigned by vmware
CVE-2026-59387Broken access control restriction in Cloud Controller API
High 8.8
In plain English
A high-severity improper access control in CAPI (Cloud Controller API) from Cloud Foundry. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Official description
The Nginx routing configuration for Cloud Controller blocks unauthenticated access to /internal/v4/ and /internal/v5/ endpoints but omits an equivalent deny rule for /internal/v3/. As a result, the staging callback endpoints /internal/v3/staging/:guid/droplet_completed and /internal/v3/staging/:guid/build_completed are reachable from the public API listener without OAuth or mutual TLS. An attacker with a valid build or droplet GUID can submit a forged staging callback, transition a droplet to STAGED, and persist arbitrary process metadata and sidecar data with no associated package or actor. A SpaceAuditor can enumerate GUIDs without write permissions, making this an effective privilege escalation beyond the intended role boundary.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cloud Foundry | CAPI (Cloud Controller API) | 0 – before v1.247.0 |
| Cloud Foundry | cf-deployment | 0 – before 60.7.0 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H