CVE-2026-90460

OpenStack Keystone Delegated Authentication Tokens Allow Unauthorized Credential Management

Published Sep 11, 2026 CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4834-1 keystone security update
Debian DSA Debian DSA DSA-6554-1 keystone security update
History
Type Values Removed Values Added
Title OpenStack Keystone Delegated Authentication Tokens Allow Unauthorized Credential Management
Type Values Removed Values Added
Title Delegated Authentication Tokens Allow Unauthorized Credential Manipulation in OpenStack Keystone
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Delegated Authentication Tokens Allow Unauthorized Credential Manipulation in OpenStack Keystone
Type Values Removed Values Added
Title Unrestricted Credential Manipulation via Delegated Tokens in Keystone
Type Values Removed Values Added
Title Unrestricted Credential Manipulation via Delegated Tokens in Keystone
Type Values Removed Values Added
Title Delegated Authentication Credential API Abuse in OpenStack Keystone
Type Values Removed Values Added
Title Delegated Authentication Credential API Abuse in OpenStack Keystone
Type Values Removed Values Added
Title Credential API Bypass via Delegated Authentication Tokens in OpenStack Keystone
Type Values Removed Values Added
Title Credential API Bypass via Delegated Authentication Tokens in OpenStack Keystone
Type Values Removed Values Added
Description 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.
First Time appeared Openstack
Openstack keystone
Weaknesses CWE-863
CPEs cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
Vendors & Products Openstack
Openstack keystone
References
Metrics cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 13, 2026, 4:09 PM
Reserved
Sep 11, 2026, 9:22 PM
Status
Awaiting Analysis
Published
Sep 11, 2026, 10:16 PM
Modified
Oct 13, 2026, 5:17 PM