CVEvulnerability

CVE-2026-43000

8.8 HIGH Published 2026-05-28 Modified 2026-10-26 Official page ↗
Status
Modified
Published
2026-05-28
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.0 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
8.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Weaknesses
CWE-266, CWE-863

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.

Affected configurations

• openstack keystone (>= 14.0.0 < 27.0.2) • openstack keystone (>= 28.0.0 < 28.0.2) • openstack keystone (>= 29.0.0 < 29.0.2)

Related

Weakness · CWE (2)

  • CWE-266 Incorrect Privilege Assignment weakness
  • CWE-863 Incorrect Authorization weakness

References