> CVE-2026-40683 [HIGH]

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PUBLISHED
2026-04-14 20:16
MODIFIED
2026-04-14 20:16
CVSS_SCORE V3
7.7
EPSS (Prob. Exploit)
0.34%
Top 72.7%
DATA SOURCES:
NVD 🔗 2026-04-14 RED HAT 🔗 2026-04-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H
EXPLOITABILITY
1.8
IMPACT
5.3

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-843

> CWE DETAILED DESCRIPTIONS

CWE-843: Access of Resource Using Incompatible Type - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat OpenStack Services on OpenShift 18.0 (openstack-keystone) security update
An update for openstack-keystone is now available for Red Hat OpenStack Services on OpenShift 18.0 (Antelope). Red Hat Product Security has rated this update as having a security impact of Important....

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> GITHUB SECURITY ADVISORY

GHSA-pfx2-9x9m-7ghx HIGH

OpenStack Keystone: LDAP identity backend does not convert enabled attribute to boolean

AFFECTED PACKAGES:
PIP / keystone
< 28.0.1
Fixed in: 28.0.1

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/04/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses th...
Nouvelle valeur:
CWE-843: Access of Resource Using Incompatible Type - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a...
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') - The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses th...
📊 ENRICHISSEMENT 19/04/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 19/04/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 4 Dernière mise à jour: 1 week ago

> REFERENCES

https://bugs.launchpad.net/keystone/+bug/2121152
https://bugs.launchpad.net/keystone/+bug/2141713
https://review.opendev.org/958205
https://www.openwall.com/lists/oss-security/2026/04/14/9
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