CVE-2026-40683_CVE-2026-40683

7.7 / 10

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H

Description

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.

Basic Information

ID CVE-2026-40683

Source mitre

Published Apr 14, 2026 at 20:05

Modified Apr 14, 2026 at 20:06

Affected Product

Vendor OpenStack

Product Keystone

Version 8.0.0

Affected Versions OpenStack Keystone 8.0.0
OpenStack Keystone 26.0.0
OpenStack Keystone 27.0.0
OpenStack Keystone 28.0.0

CWE Classification

CWE-843

References

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    "published": "2026-04-14T20:05:03.274Z",
    "modified": "2026-04-14T20:06:30.841Z",
    "type": "cve",
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