CVE-2026-59387

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.cloudfoundry.org/blog/cve-2026-59387-broken-access-control-restriction-in-cloud-controller-api/

Configurations

No configuration.

History

30 Oct 2026, 20:17

Type	Values Removed	Values Added
CWE		CWE-284

30 Oct 2026, 09:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-30 09:17

Updated : 2026-10-30 20:17

NVD link : CVE-2026-59387

Mitre link : CVE-2026-59387

CVE.ORG link : CVE-2026-59387

JSON object : View

Products Affected

No product.

CWE

CWE-284

Improper Access Control

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