CVE-2026-93854 (GCVE-0-2026-93854)

Vulnerability from cvelistv5 – Published: 2026-09-18 18:57 – Updated: 2026-09-22 15:19
VLAI
Summary
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.
Severity
7.2 (High)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:19 UTC
CWE
  • CWE-1025 - Comparison Using Wrong Factors
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2263 records in the last 180 days details
References
URL Tags
https://launchpad.net/bugs/2162719 issue-tracking
Impacted products
Vendor Product Version CPE status
OpenStack Blazar Affected: 1.0.0 , < 15.1.1 (semver)
Affected: 16.0.0 , < 16.0.1 (semver)
Affected: 17.0.0 , < 17.0.1 (semver)
guessed Create a notification for this product.
Show details on NVD website
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