CVE-2026-40214 — Denial of Service
CVE-2026-40214 — In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer. The project_id column in the database is never populated (NULL for every ARQ), database queries have no project filtering, and policy checks are self-referential (th
What This Means For You
- If your environment is affected by CWE-282, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-40214 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
OpenStack Cyborg ARQ Cross-Tenant Deletion - CVE-2026-40214
title: OpenStack Cyborg ARQ Cross-Tenant Deletion - CVE-2026-40214
id: scw-2026-05-07-ai-1
status: experimental
level: high
description: |
Detects the specific API endpoint and HTTP method used to delete Accelerator Requests (ARQs) in OpenStack Cyborg. The vulnerability CVE-2026-40214 allows any authenticated non-admin user to delete ARQs belonging to other projects due to a lack of project ownership enforcement. This rule specifically targets the DELETE request to the ARQ endpoint, indicating a potential cross-tenant denial of service attack.
author: SCW Feed Engine (AI-generated)
date: 2026-05-07
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-40214/
tags:
- attack.impact
- attack.t1529
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/accelerator_requests/'
cs-method:
- 'DELETE'
sc-status:
- '200'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40214 | vulnerability | CVE-2026-40214 |
| CWE-282 | weakness | CWE-282 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 08, 2026 at 01:16 UTC |
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