> CVE-2026-18963 [CRITICAL]

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PUBLISHED
2026-08-18 17:16
MODIFIED
2026-08-18 17:16
CVSS_SCORE V3
9.1
EPSS (Prob. Exploit)
6.41%
Top 6.3%
🎯 NUCLEI TEMPLATE
DATA SOURCES:
NVD 🔗 2026-08-18 RED HAT 🔗 2026-08-23 CWE MITRE 🔗 2026-09-01 FIRST EPSS 🔗 2026-10-25 NUCLEI 🔗 2026-10-25

> DESCRIPTION

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

> AFFECTED_PRODUCTS

Red Hat - Red Hat build of Keycloak 26.4
Red Hat - Red Hat build of Keycloak 26.6
Red Hat - Red Hat build of Keycloak 26.6.6
Red Hat - Red Hat build of Keycloak 26.4.15

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EXPLOITABILITY
3.9
IMPACT
5.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-640

> CWE DETAILED DESCRIPTIONS

CWE-640: Weak Password Recovery Mechanism for Forgotten Password - The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.15 Images Security Update
New images are available for Red Hat build of Keycloak 26.4.15 and Red Hat build of Keycloak 26.4.15 Operator, running on OpenShift Container Platform
Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Images Security Update
New images are available for Red Hat build of Keycloak 26.6.6 and Red Hat build of Keycloak 26.6.6 Operator, running on OpenShift Container Platform
Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Security Update
New Red Hat build of Keycloak 26.6.6 packages are available from the Customer Portal
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.15 Security Update
New Red Hat build of Keycloak 26.4.15 packages are available from the Customer Portal

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Critical

> NUCLEI TEMPLATES

Des templates Nuclei sont disponibles pour scanner cette vulnérabilité.

🎯
CVE-2026-18963.yaml
http/cves/2026/CVE-2026-18963.yaml
Usage: nuclei -t http/cves/2026/CVE-2026-18963.yaml -u target.com

> HISTORIQUE DES MODIFICATIONS

Première apparition
18/08/2026 17:16
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-640: Weak Password Recovery Mechanism for Forgotten Password - The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechan...
📊 ENRICHISSEMENT 23/08/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Critical", "severity_scale": null }
📊 ENRICHISSEMENT 23/08/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 1 month ago

> REFERENCES

https://access.redhat.com/security/cve/CVE-2026-18963
https://bugzilla.redhat.com/show_bug.cgi?id=2511595
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