---
id: CVE-2026-93852
title: >-
  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
summary: >-
  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 …
severity: high
cvss: 7.1
cvssVector: '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'
cwe:
  - CWE-862
vendor: OpenStack
product: Blazar
affected:
  - Blazar >= 1.0.0 < 15.1.1
  - Blazar >= 16.0.0 < 16.0.1
  - Blazar >= 17.0.0 < 17.0.1
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:56:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93852'
references:
  - url: 'https://launchpad.net/bugs/2162719'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00372
epssPercentile: 0.28347
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:47:04.142626Z'
cvssSource: cna
ingestedAt: '2026-09-18T19:49:30.582Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.