---
id: CVE-2026-90460
title: An issue was discovered in OpenStack Keystone before 29.0.3
summary: >-
  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 d…
severity: high
cvss: 7.6
cvssVector: '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'
cwe:
  - CWE-863
vendor: OpenStack
product: Keystone
affected:
  - Keystone >= 13.0.0 < 27.0.3
  - Keystone >= 28.0.0 < 28.0.3
  - Keystone >= 29.0.0 < 29.0.3
published: '2026-09-11'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:56:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90460'
references:
  - url: 'https://launchpad.net/bugs/2158931'
    label: cve@mitre.org
  - url: 'https://launchpad.net/bugs/2159643'
    label: cve@mitre.org
  - url: 'https://review.opendev.org/1002330'
    label: cve@mitre.org
  - url: 'https://launchpad.net/bugs/2158931'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://launchpad.net/bugs/2159643'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00554
epssPercentile: 0.43815
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T16:13:51.197700Z'
cvssSource: cna
ingestedAt: '2026-09-14T11:11:19.877Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.