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CVE-2026-59387high8.8

Broken access control restriction in Cloud Controller API

Impact

Cloud Controller API versions before v1.247.0 and cf-deployment versions before 60.7.0 have a broken access control restriction, allowing attackers with a valid build or droplet GUID to submit forged staging callbacks and escalate privileges. The weakness is due to a missing deny rule for /internal/v3/ endpoints. An attacker can exploit this without OAuth or mutual TLS.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Cloud Foundry · vmware

CAPI (Cloud Controller API)

1 range
vmware version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before v1.247.0

semver versions

unaffected

unknown

Other versions: unknown

Cloud Foundry · vmware

cf-deployment

1 range
vmware version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 60.7.0

semver versions

unaffected

unknown

Other versions: unknown

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-59387

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-284 ↗

CWE-284 Improper Access Control

CISA-ADP

Related →
Contributing organizations · 2
vmware

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-59387

    Observed 2026-10-30T20:23:54.922Z · upstream updated 2026-10-30T20:10:53.458Z

    Weakness classification changed

    before

    []

    after

    [
  {
    "id": "CWE-284",
    "description": "CWE-284 Improper Access Control",
    "source": "CISA-ADP"
  }
]
  2. CVE · CVE-2026-59387

    Observed 2026-10-30T17:16:48.524Z · upstream updated 2026-10-30T15:47:46.591Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T15:27:30.662530Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

1 sources
www.cloudfoundry.org/blog/cve-2026-59387-broken-access-control-restriction-in-cloud-controller-api/
Security advisoryvmware