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.

The remote Ubuntu 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8413-1 advisory.

    It was discovered that Cyborg did not properly enforce project ownership in the Accelerator Request (ARQ)     API. An authenticated user could possibly use this issue to delete ARQs bound to other projects'     instances, resulting in a cross-tenant denial of service. (CVE-2026-40214)

    It was discovered that Cyborg used a permissive default policy that authorized any request carrying a     valid authentication token, regardless of roles or scope, for multiple API endpoints. An authenticated     user could possibly use this issue to perform unauthorized actions, such as reprogramming FPGA bitstreams     on arbitrary compute nodes. (CVE-2026-40213)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6315 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6315-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     May 31, 2026                          https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : cyborg     CVE ID         : CVE-2026-40213 CVE-2026-40214

    Two security vulnerabilities have been discovered in Cyborg, the     OpenStack component for management of hardware accelerators, which could     result in incomplete access controls.

    For the stable distribution (trixie), these problems have been fixed in     version 14.0.0-3+deb13u1.

    We recommend that you upgrade your cyborg packages.

    For the detailed security status of cyborg please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/cyborg

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-40214)

ID	Name	Product	Family	Severity
320401	Ubuntu 25.10 / 26.04 LTS : Cyborg vulnerabilities (USN-8413-1)	Nessus	Ubuntu Local Security Checks	high
318079	Debian dsa-6315 : cyborg-agent - security update	Nessus	Debian Local Security Checks	high
441795	SCA: security update for openstack-cyborg (GHSA-mmpc-xjxr-5hf8)	Tenable Cloud Security	SCA Checks	medium
441795	SCA: security update for openstack-cyborg (GHSA-mmpc-xjxr-5hf8)	Tenable Self-Hosted Container Security	SCA Checks	medium

Detections

Analytics

CVE-2026-40214

medium

Tenable Plugins

high

high

medium

medium