CVE-2026-93852

OpenStack Blazar Lease Enumeration and Modification via Unrestricted Lease Listing

Published Sep 18, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
First Time appeared Openstack
Openstack blazar
Vendors & Products Openstack
Openstack blazar
Type Values Removed Values Added
Title OpenStack Blazar Lease Enumeration and Modification via Unrestricted Lease Listing
Type Values Removed Values Added
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.
Weaknesses CWE-862
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 18, 2026, 7:47 PM
Reserved
Sep 18, 2026, 6:48 PM
Status
Awaiting Analysis
Published
Sep 18, 2026, 7:17 PM
Modified
Sep 22, 2026, 7:56 PM