{"id":"DEBIAN-CVE-2026-93854","details":"In OpenStack Blazar before 17.0.1, the V2 lease API does not enforce object-level authorization on its update and delete operations (PUT /v2/leases/{lease_id} and DELETE /v2/leases/{lease_id}). The policy authorize() wrapper attempts to load the target lease to build the authorization target from its owner, but it looks up the lease under the keyword \"lease_id\" whereas the controller methods name the parameter \"id\" (and the wsme_pecan.wsexpose wrapper delivers it positionally). The lookup returns None, and thus authorization falls back to the requesting user's own project_id/user_id instead of the target lease owner. Any authenticated user who knows a lease ID can therefore modify or delete leases belonging to other users and projects, bypassing the intended ownership check.","modified":"2026-09-29T10:00:09.072726690Z","published":"2026-09-18T19:17:25.440Z","upstream":["CVE-2026-93854"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-93854"}],"affected":[{"package":{"name":"blazar","ecosystem":"Debian:13","purl":"pkg:deb/debian/blazar?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["15.0.0-3","16.0.0-1","16.0.0~rc1-1","16.0.0~rc1-2","16.0.0~rc1-3","17.0.0-1","17.0.0-2","17.0.0~rc1-1","17.0.0~rc1-3","18.0.0~rc1-1","18.0.0~rc1-2","18.0.0~rc1-3","18.0.0~rc2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93854.json"}},{"package":{"name":"blazar","ecosystem":"Debian:14","purl":"pkg:deb/debian/blazar?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.0.0~rc1-3"}]}],"versions":["15.0.0-3","16.0.0-1","16.0.0~rc1-1","16.0.0~rc1-2","16.0.0~rc1-3","17.0.0-1","17.0.0-2","17.0.0~rc1-1","17.0.0~rc1-3","18.0.0~rc1-1","18.0.0~rc1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93854.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:N/VI:H/VA:H/SC:N/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"}]}