{"id":"DEBIAN-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":"2026-10-09T08:00:08.947126787Z","published":"2026-10-08T18:18:30.817Z","upstream":["CVE-2026-93858"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-93858"}],"affected":[{"package":{"name":"mistral","ecosystem":"Debian:12","purl":"pkg:deb/debian/mistral?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["15.0.0-1","15.0.0-1+deb12u1","16.0.0-1","16.0.0-2","16.0.0-3","16.0.0-4","16.0.0~rc1-1","17.0.0-1","17.0.0-2","17.0.0-3","17.0.0~rc1-1","18.0.0~rc1-1","18.0.1-1","19.0.0-1","19.0.0-2","19.0.0~rc1-1","19.0.0~rc1-2","20.0.0-1","20.0.0-2","20.0.0~rc1-1","20.0.0~rc1-2","21.0.0-1","21.0.0-2","21.0.0-4","21.0.0-5","21.0.0-6","21.0.0~rc1-1","21.0.0~rc1-2","22.0.0-1","22.0.0-3","22.0.0~rc1-1","22.0.0~rc1-2","22.0.0~rc1-3","23.0.0-1","23.0.0~rc1-1","23.0.0~rc1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93858.json"}},{"package":{"name":"mistral","ecosystem":"Debian:13","purl":"pkg:deb/debian/mistral?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.0.0-2","20.0.0-2+deb13u1","21.0.0-1","21.0.0-2","21.0.0-4","21.0.0-5","21.0.0-6","21.0.0~rc1-1","21.0.0~rc1-2","22.0.0-1","22.0.0-3","22.0.0~rc1-1","22.0.0~rc1-2","22.0.0~rc1-3","23.0.0-1","23.0.0~rc1-1","23.0.0~rc1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93858.json"}},{"package":{"name":"mistral","ecosystem":"Debian:14","purl":"pkg:deb/debian/mistral?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.0.0-2","21.0.0-1","21.0.0-2","21.0.0-4","21.0.0-5","21.0.0-6","21.0.0~rc1-1","21.0.0~rc1-2","22.0.0-1","22.0.0-3","22.0.0~rc1-1","22.0.0~rc1-2","22.0.0~rc1-3","23.0.0-1","23.0.0~rc1-1","23.0.0~rc1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}