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PASSEDcloud / gcp_gcs
GCP: GCS Bucket Permissions Changed — Access Denied
IAM permissions on a GCS bucket were changed, blocking the application's service account from reading objects.
Pattern
CLIENT_ERROR
Expected: GCP_IAM_DENIED
Severity
MEDIUM
Confidence
68%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | GCP_IAM_DENIED | CLIENT_ERROR | |
| Severity Assessment | CRITICAL | MEDIUM | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
GCP GCS bucket 'company-assets'. IAM policy updated, removed roles/storage.objectViewer from app service account. All object reads returning 403.
Injected Error Messages (1)
GCP GCS access denied — bucket 'company-assets' IAM policy changed, service account lost storage.objectViewer role, all object reads returning 403 Forbidden, assets not loading
Neural Engine Root Cause Analysis
Client error detected — the server is returning 4xx errors, which may indicate misconfigured authentication, missing routes, or access control issues.
Remediation Plan
Check if authentication credentials or tokens have expired. Verify endpoint configuration and access permissions.
Improvements Applied
- Pattern classified as CLIENT_ERROR (expected GCP_IAM_DENIED)
- Severity: MEDIUM (expected CRITICAL)
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnr9bl09cblig7shgs82mr