{"id":"CVE-2026-40213","aliases":["GHSA-mm7j-mhhj-hj36","PYSEC-2026-2853"],"title":"OpenStack Cyborg uses rule:allow (check_str='@') as the default policy for multiple API endpoints","summary":"OpenStack Cyborg uses rule:allow (check_str='@') as the default policy for multiple API endpoints","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L","vendor":"openstack-cyborg","product":"openstack-cyborg","ecosystem":"pip","affected":["openstack-cyborg < 16.0.1"],"patched":["openstack-cyborg 16.0.1"],"published":"2026-05-08","updated":"2026-07-13","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-mm7j-mhhj-hj36","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40213"},{"url":"https://bugs.launchpad.net/openstack-cyborg/+bug/2143263"},{"url":"https://github.com/openstack/cyborg"},{"url":"https://security.openstack.org/ossa/OSSA-2026-011.html"},{"url":"https://www.openwall.com/lists/oss-security/2026/05/07/6"}],"tags":["osv","pip"],"epss":0.00206,"epssPercentile":0.11045,"ingestedAt":"2026-07-13T18:58:00.758Z","slug":"CVE-2026-40213","body":"## Overview\n\nOpenStack 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.\n\n## Affected packages\n\n- `openstack-cyborg < 16.0.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openstack-cyborg 16.0.1`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}