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CVE-2026-93852

Quick assessment

Affected
OpenStack Blazar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 OpenStack Blazar 17.0.1 之前的版本中，V2 租约列表操作（GET /v2/leases）会返回所有项目的租约，且未强制实施项目范围限制或仅限管理员访问的策略。任何拥有 Blazar REST API 访问权限的已认证用户都可以枚举属于其他租户的租约，从而泄露租约 ID、预留 ID、资源 ID 及预留元数据。这些暴露的租约 ID 还使得在相关请求中跟踪的对象级授权绕过成为可能，攻击者可据此修改或删除所枚举的租约。

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1006 · Direct Volume Access

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenStack Blazar 1.0.0< 15.1.1 affected
16.0.0< 16.0.1 affected
17.0.0< 17.0.1 affected
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I. Basic Information for CVE-2026-93852

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Blazar 1.0.0 ~ 15.1.1 -

II. Public POCs for CVE-2026-93852

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-93852

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Other References for CVE-2026-93852 (1)

IV. Related Vulnerabilities

Same product: Blazar
Same vendor: OpenStack
Same weakness: CWE-862

V. Comments for CVE-2026-93852

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