CVE-2026-40213
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
7.4
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.
- Record
CVE-2026-40213- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2026-28455
7.4
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.
- Record
EUVD-2026-28455- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mm7j-mhhj-hj36
7.4
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.
- Record
GHSA-mm7j-mhhj-hj36- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
7.4
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.
- Record
CVE-2026-40213- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-40213
7.4
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.
- Record
DEBIAN-CVE-2026-40213- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Updated
- 2026-11-02
OSVGHSA-mm7j-mhhj-hj36
7.4
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.
- Record
GHSA-mm7j-mhhj-hj36- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVPYSEC-2026-2853
7.4
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.
- Record
PYSEC-2026-2853- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-40213
7.4
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.
- Record
UBUNTU-CVE-2026-40213- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - Updated
- 2026-11-02
OSVUSN-8413-1 No score
cyborg vulnerabilities
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)
- Record
USN-8413-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openstack-cyborgPyPI |
before 16.0.1 | 16.0.1 |
cyborgDebian:13 |
before 14.0.0-3+deb13u1, plus listed versions 14.0.0-3 |
14.0.0-3+deb13u1 |
cyborgDebian:14 |
before 16.0.0+git+2026.04.26.b8edfa06f1-1, plus listed versions 14.0.0-315.0.0-115.0.0~rc1-115.0.0~rc1-215.0.0~rc1-3 Show 5 moreShow less16.0.0-116.0.0-216.0.0~rc1-116.0.0~rc1-216.0.0~rc2-1 |
16.0.0+git+2026.04.26.b8edfa06f1-1 |
openstack-cyborgPyPI |
before 16.0.1, plus listed versions 0.1.00.2.01.0.01.0.0.0b31.0.0.0rc1 Show 42 moreShow less10.0.010.0.0.0rc110.1.011.0.011.0.0.0rc112.0.012.0.0.0rc113.0.013.0.0.0rc114.0.014.0.0.0rc114.1.015.0.015.0.0.0rc115.0.116.0.016.0.0.0rc116.0.0.0rc22.0.02.0.0.0rc13.0.03.0.0.0rc13.0.14.0.04.0.0.0rc14.0.15.0.05.0.0.0rc15.0.0.0rc25.0.16.0.06.0.0.0rc16.0.0.0rc26.0.17.0.07.0.0.0rc17.0.18.0.08.0.0.0rc18.0.19.0.09.0.0.0rc1 |
16.0.1 |
cyborgUbuntu:25.10 |
before 14.0.0-3+deb13u1build0.25.10.1, plus listed versions 13.0.0-214.0.0-214.0.0-3 |
14.0.0-3+deb13u1build0.25.10.1 |
cyborgUbuntu:26.04:LTS |
before 16.0.0-2ubuntu0.1, plus listed versions 14.0.0-315.0.0-116.0.0~rc1-216.0.0-2 |
16.0.0-2ubuntu0.1 |
cyborgUbuntu:25.10 From an advisory covering 2 CVEs |
before 14.0.0-3+deb13u1build0.25.10.1, plus listed versions 13.0.0-214.0.0-214.0.0-3 |
14.0.0-3+deb13u1build0.25.10.1 |
cyborgUbuntu:26.04:LTS From an advisory covering 2 CVEs |
before 16.0.0-2ubuntu0.1, plus listed versions 14.0.0-315.0.0-116.0.0~rc1-216.0.0-2 |
16.0.0-2ubuntu0.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-40213 is a high vulnerability (CVSS 7.4) in Openstack Cyborg, published May 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 10th percentile. Fixed in openstack-cyborg 16.0.1.