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CVE-2026-40683GHSA-PFX2-9X9M-7GHXPYSEC-2026-2550

In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the user_enable

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 25.0.1, 26.1.1, 27.0.1, 28.0.1
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the user_enabled_invert configuration option is False (the default). The _ldap_res_to_model method in the UserApi class only performed string-to-boolean conversion when user_enabled_invert was True. When False, the raw string value from LDAP (e.g., "FALSE") was used directly. Since non-empty strings are truthy in Python, users marked as disabled in LDAP were treated as enabled by Keystone, allowing them to authenticate and perform actions. All deployments using the LDAP identity backend without user_enabled_invert=True or user_enabled_emulation are affected.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • OpenStack Keystone

    From 8.0.0 · fixed in 25.0.1; From 26.0.0 · fixed in 26.1.1; From 27.0.0 · fixed in 27.0.1; From 28.0.0 · fixed in 28.0.1

  • keystonePyPI

    fixed in 28.0.1

  • keystonePyPI

    fixed in 28.0.1

References 4

bugs.launchpad.net

review.opendev.org

openwall.com