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Medium

OpenStack Keystone has an Incorrect Authorization issue

  • Disclosed: 28.05.2026
  • Updated: 11.10.2026 15:17

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 software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) keystone >= 14.0.0, < 27.0.2, >= 28.0.0, < 28.0.2, >= 29.0.0, < 29.0.2 27.0.2, 28.0.2, 29.0.2

References

CVSS score 6/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
Weakness (CWE)
CWE-266, CWE-863
Platform
Python (PyPI)
Package
keystone
Disclosed
28.05.2026
Updated
11.10.2026 15:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-601 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-q623-f4j4-p4xj - CC BY 4.0

Vulnerability history: keystone

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (42) in the archive
Total entries
42
First → latest
09.2012 05.2026
Without a fix
3
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 18
  • Medium 21
  • Low 1
  • Unrated 1

Disclosures per year

earlier: 13

Severity:
  1. OpenStack Keystone has an Incorrect Authorization issue this entry
    Medium · 6.0 CVE-2026-43000 >= 14.0.0, < 27.0.2, >= 28.0.0, < 28.0.2, >= 29.0.0, < 29.0.2 27.0.2, 28.0.2, 29.0.2
  2. OpenStack Keystone has an Incorrect Authorization Issue
    High · 7.9 CVE-2026-43001 >= 13.0.0, <= 29.0.1 no fix
  3. OpenStack Keystone: LDAP identity backend does not convert enabled attribute to boolean
    High · 7.7 CVE-2026-40683 < 28.0.1 28.0.1
  4. OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS Signature to provide Keystone authorization.
    High · 7.5 CVE-2025-65073 < 26.0.1, >= 27.0.0.0rc1, < 27.0.0, >= 28.0.0.0rc1, < 28.0.0 26.0.1, 27.0.0, 28.0.0
  5. Openstack Keystone Incorrect Authorization vulnerability
    Critical · 9.1 CVE-2021-3563 <= 21.0.0 no fix
  6. OpenStack Keystone allows information disclosure during account locking
    High · 7.5 CVE-2021-38155 >= 10.0, < 16.0.2, >= 17.0, < 17.0.1, >= 18.0, < 18.0.1, >= 19.0, < 19.0.1 16.0.2, 17.0.1, 18.0.1, 19.0.1
  7. OpenStack Keystone Improper Authentication vulnerability
    High CVE-2012-4456 >= 2012.1, < 2012.1.2 2012.1.2
  8. An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any user authenticated within a limited scope (trust/oauth/application credential) can create an EC2 credential with an escalat
    High · 8.8 CVE-2020-12689 < 15.0.1 15.0.1
  9. An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then p
    High · 8.8 CVE-2020-12691 < 15.0.1 15.0.1
  10. Insufficient Session Expiration in OpenStack Keystone
    High · 8.8 CVE-2020-12690 < 15.0.1, >= 16.0.0.0rc1, < 16.0.0 15.0.1, 16.0.0
  11. OpenStack Keystone 15.0.0 and 16.0.0 is affected by Data Leakage in the list credentials API. Any user with a role on a project is able to list any credentials with the /v3/credentials API when enforc
    High · 8.8 CVE-2019-19687 < 16.0.1 16.0.1
  12. An authorization-check flaw was discovered in federation configurations of the OpenStack Identity service (keystone). An authenticated federated user could request permissions to a project and uninten
    High · 7.2 CVE-2017-2673 >= 9.0.0, < 10.0.2, >= 11.0.0, < 11.0.1 10.0.2, 11.0.1
  13. OpenStack Identity Keystone and keystonemiddleware Insufficiently Protected Credentials
    High · 7.5 CVE-2015-7546 >= 8.0, < 8.1.0, >= 9.0.0.0b1, < 9.0.0.0b2 8.1.0, 9.0.0.0b2
  14. OpenStack Identity (Keystone) Multiple vulnerabilities in revocation events
    High · 6.5 CVE-2014-5251 < 8.0.0a0 8.0.0a0
  15. OpenStack Identity (Keystone) UUID v2 tokens does not expire with revocation events
    High · 6.5 CVE-2014-5252 < 8.0.0a0 8.0.0a0
  16. OpenStack Keystone Domain-scoped tokens don't get revoked
    High · 6.5 CVE-2014-5253 < 8.0.0a0 8.0.0a0
  17. OpenStack Identity (Keystone) DoS through V3 API authentication chaining
    High · 7.5 CVE-2014-2828 < 8.0.0a0 8.0.0a0
  18. OpenStack Identity (Keystone) Trustee token revocations does not work with memcache backend
    High · 6.5 CVE-2014-2237 < 8.0.0a0 8.0.0a0
  19. OpenStack Keystone, as used in OpenStack Folsom 2012.2, does not properly implement token expiration, which allows remote authenticated users to bypass intended authorization restrictions by creating
    High · 5.9 CVE-2012-5563 all versions no fix
  20. OpenStack Keystone Allows Remote User Account Creation
    High · 7.5 CVE-2012-3542 < 2012.1 2012.1

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