{"id":"CVE-2026-93858","details":"In OpenStack Mistral through 23.0.0, the std.ssh_proxied action passes a caller-supplied proxy_command value directly to paramiko.ProxyCommand() before any SSH connection to a gateway or target host is attempted. An authenticated project member can use the standard action-execution API to submit an arbitrary local command as proxy_command; paramiko starts that command as a subprocess on the executor host under the executor's own service account, independent of whether the SSH connection itself ever succeeds. Only Mistral deployments that permit the std.ssh_proxied action, the default configuration, are affected.","modified":"2026-10-10T02:47:32.677317786Z","published":"2026-10-08T17:28:58.167Z","database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93858.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"20.1.1"},{"introduced":"21.0.0"},{"fixed":"21.0.1"},{"introduced":"22.0.0"},{"fixed":"22.0.1"}]}]},"references":[{"type":"WEB","url":"https://opendev.org/openstack/mistral"},{"type":"WEB","url":"https://security.openstack.org/ossa/OSSA-2026-044.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93858.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93858"},{"type":"REPORT","url":"https://launchpad.net/bugs/2162100"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://opendev.org/openstack/mistral","events":[{"introduced":"a28388efe2dab9d20e444fa6322cdc87372bbd41"},{"last_affected":"a28388efe2dab9d20e444fa6322cdc87372bbd41"}],"database_specific":{"extracted_events":[{"introduced":"23.0.0"},{"last_affected":"23.0.0"}],"source":"AFFECTED_FIELD"}}],"versions":["23.0.0","23.0.0.0rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93858.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:N/SA:N"}]}