CVE-2026-40214
MEDIUMDescription
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 (the authorize_wsgi decorator compares the caller's project_id with itself rather than the target resource). Any authenticated non-admin user can complete various actions such as deleting ARQs bound to other projects' instances, aka cross-tenant denial of service.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 11% of all known CVEs.
References
Related Vulnerabilities
Other CWE-282 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-0386 | High | 7.8 | 7.9% | KEV | Fix |
| CVE-2026-23514 | High | 8.8 | 1.0% | - | - |
| CVE-2024-8949 | Medium | 6.3 | 0.7% | - | - |
| CVE-2024-3383 | High | 7.4 | 0.6% | - | Fix |
| CVE-2020-10632 | High | 8.8 | 0.5% | - | - |
| CVE-2022-29187 | High | 7.8 | 0.4% | - | Fix |
Common questions
How do I fix CVE-2026-40214?
Published advisories record a fix for 7 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2026-40214 being actively exploited?
Not that we know of. CVE-2026-40214 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.21% is the estimated probability that it will be exploited in the next 30 days. That is higher than 11% of all scored CVEs.
How severe is CVE-2026-40214?
CVE-2026-40214 has a CVSS v3 base score of 6.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-40214 affect?
Published advisories record a fix for cyborg (Debian), cyborg (Ubuntu), cyborg-agent (Ubuntu), cyborg-api (Ubuntu), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-40214
Markdown
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<a href="https://tridentstack.com/cve/CVE-2026-40214"><img src="https://tridentstack.com/cve/badge/CVE-2026-40214.svg" alt="CVE-2026-40214"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-08.