OpenStack Cyborg uses rule:allow (check_str='@') as the default policy for multiple API endpoints
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | openstack-cyborg | < 16.0.1 | 16.0.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-40213
- https://bugs.launchpad.net/openstack-cyborg/+bug/2143263
- https://github.com/openstack/cyborg
- https://security.openstack.org/ossa/OSSA-2026-011.html
- https://www.openwall.com/lists/oss-security/2026/05/07/6
- https://pypi.org/project/openstack-cyborg
- https://github.com/advisories/GHSA-mm7j-mhhj-hj36
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L- Weakness (CWE)
CWE-863- Platform
- Python (PyPI)
- Package
openstack-cyborg- Disclosed
- 08.05.2026
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2853 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-mm7j-mhhj-hj36 - CC BY 4.0
Vulnerability history: openstack-cyborg
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2026 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
-
OpenStack Cyborg uses rule:allow (check_str='@') as the default policy for multiple API endpoints this entry
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