CVE-2026-40683 (GCVE-0-2026-40683)

Vulnerability from cvelistv5 – Published: 2026-04-14 20:05 – Updated: 2026-04-14 20:14
VLAI?
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.
Severity ?
7.7 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
Impacted products
Vendor Product Version
OpenStack Keystone Affected: 8.0.0 , < 25.0.1 (semver)
Affected: 26.0.0 , < 26.1.1 (semver)
Affected: 27.0.0 , < 27.0.1 (semver)
Affected: 28.0.0 , < 28.0.1 (semver)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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