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CVE-2026-43000

Quick assessment

Affected
OpenStack Keystone
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.

OpenStack Keystone是OpenStack开源的一个核心认证组件库。 OpenStack Keystone 29.0.2之前版本存在安全漏洞，该漏洞源于应用凭证冒充漏洞与信任机制结合，可能导致具有成员角色的攻击者通过链式操作提升为管理员。

CVSS 6.0 · Medium EPSS 0.43% · P36

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenStack Keystone 14.0.0< 27.0.2 affected
28.0.0< 28.0.2 affected
29.0.0< 29.0.2 affected
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I. Basic Information for CVE-2026-43000

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in OpenStack Keystone before 29.0.2. When combined with an application credential impersonation vulnerability, an attacker with the member role on a project can escalate to admin by chaining unrestricted application credentials with Keystone trusts. The impersonated token carries the victim's identity, which passes the trustor validation check. Keystone then validates the delegated roles against the victim's actual role assignments in the database, not the roles on the requesting token. This allows the attacker to create a trust delegating the victim's admin role to themselves. The trust persists independently, and additional trusts and application credentials can be created to maintain access. All actions are logged under the victim's identity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Keystone 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenStack Keystone是OpenStack开源的一个核心认证组件库。 OpenStack Keystone 29.0.2之前版本存在安全漏洞，该漏洞源于应用凭证冒充漏洞与信任机制结合，可能导致具有成员角色的攻击者通过链式操作提升为管理员。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Keystone 14.0.0 ~ 27.0.2 -

II. Public POCs for CVE-2026-43000

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III. Intelligence Information for CVE-2026-43000

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Vendor Advisories for CVE-2026-43000 (1)

Other References for CVE-2026-43000 (1)

Same Patch Batch · OpenStack · 2026-05-28 · 5 CVEs total

CVE-2026-42998 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-42999 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-44394 6.0 MEDIUM OpenStack Keystone 安全漏洞
CVE-2026-49299 OpenStack Neutron 安全漏洞

IV. Related Vulnerabilities

Same product: Keystone
Same vendor: OpenStack
Same weakness: CWE-863

V. Comments for CVE-2026-43000

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