CVE-2026-93852
High
Description
In OpenStack Blazar before 17.0.1, the V2 lease listing operation (GET /v2/leases) returns leases for every project without enforcing project scoping or an administrator-only policy. Any authenticated user with access to the Blazar REST API can enumerate leases belonging to other tenants, exposing lease IDs, reservation IDs, resource IDs, and reservation metadata. The exposed lease IDs also enable the object-level authorization bypass tracked in the companion request, allowing an attacker to then modify or delete the enumerated leases.
SeverityHigh
CVSS7.1
Exploit probability—
ProductBlazar
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- OpenStack Blazar15.1.1, 16.0.1, 17.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenStack Blazar | 1.0.0 ≤ v < 15.1.1, 16.0.0 ≤ v < 16.0.1, 17.0.0 ≤ v < 17.0.1 | 15.1.1, 16.0.1, 17.0.1 |
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