Vulnerability · Published May 7, 2026 · Assigned by mitre
CVE-2026-40213
High 7.4
In plain English
A high-severity incorrect authorization in Cyborg from OpenStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints. This unconditionally authorizes any request carrying a valid Keystone token regardless of roles, project membership, or scope. An authenticated user with zero role assignments can complete various actions such as reprogramming FPGA bitstreams on arbitrary compute nodes via agent RPC.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | cyborg | 14.0.0-3+deb13u1 | DEBIAN-CVE-2026-40213 |
| Debian:14 | cyborg | 16.0.0+git+2026.04.26.b8edfa06f1-1 | DEBIAN-CVE-2026-40213 |
| PyPI | openstack-cyborg | 16.0.1 | GHSA-mm7j-mhhj-hj36 |
| PyPI | openstack-cyborg | 16.0.1 | PYSEC-2026-2853 |
| Ubuntu:25.10 | cyborg | 14.0.0-3+deb13u1build0.25.10.1 | USN-8413-1 |
| Ubuntu:25.10 | cyborg | 14.0.0-3+deb13u1build0.25.10.1 | UBUNTU-CVE-2026-40213 |
| Ubuntu:26.04:LTS | cyborg | 16.0.0-2ubuntu0.1 | UBUNTU-CVE-2026-40213 |
| Ubuntu:26.04:LTS | cyborg | 16.0.0-2ubuntu0.1 | USN-8413-1 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L