What’s Vulnerable › Vulnerabilities

CVE-2026-40214

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-07 · updated 2026-10-26
• Weakness: CWE-282

Description

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.

Affected products

• OpenStack Cyborg: from 3.0.0 before 14.0.1; from 15.0.0 before 15.0.1; from 16.0.0 before 16.0.1 — fixed in 14.0.1, 15.0.1, 16.0.1

How to fix

Upgrade to a fixed version: OpenStack Cyborg 14.0.1, 15.0.1, 16.0.1. Check the vendor advisory for mitigations.

References

• https://bugs.launchpad.net/openstack-cyborg/+bug/2144056
• https://security.openstack.org/ossa/OSSA-2026-011.html
• https://www.openwall.com/lists/oss-security/2026/05/07/6

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