OpenStack Keystone <29.0.3 Credential API Priv Escalation via Delegated Tokens
CVE-2026-90460 Published on September 11, 2026
An issue was discovered in OpenStack Keystone before 29.0.3. Tokens obtained via delegated authentication methods (EC2 credentials, application credentials, OAuth1 access tokens, and trusts) are not blocked from creating, modifying, or deleting credentials via the /v3/credentials API. EC2-derived tokens can additionally read credential blobs, exposing TOTP MFA seeds and other secrets. Also, PATCH /v3/credentials does not validate the requested post-update project_id, allowing any delegated token to move a credential to an unauthorized project. All Keystone deployments using delegated authentication are affected.
Vulnerability Analysis
CVE-2026-90460 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-90460. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-90460 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-90460
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Affected Versions
OpenStack Keystone:- Version 13.0.0 and below 27.0.3 is affected.
- Version 28.0.0 and below 28.0.3 is affected.
- Version 29.0.0 and below 29.0.3 is affected.