Keycloak-services: keycloak-services: stateless token preferred_username fallback enables identity rebinding

Özet

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A flaw was found in the TokenManager component of Keycloak, an open-source identity and access management solution. The issue occurs during the validation of stateless access tokens when the original user ID no longer exists. Keycloak incorrectly falls back to using the username to identify the user without verifying if the identity matches the original token subject. This could allow an attacker with an old token to gain access to a newly created service account if it shares the same client ID as a previously deleted one.

Etkilenen sürümler2 yazılım

Kaynaklar5 kaynak

• CVE.org kaydı
• NVD kaydı
• access.redhat.com/errata/RHSA-2026:95761 Üretici bülteni
• bugzilla.redhat.com/show_bug.cgi Üçüncü taraf
• access.redhat.com/security/cve/CVE-2026-96447 Diğer

Kayıt geçmişi

1. 6 Kas 2026 13:40Etkilenen sürüm bilgisi güncellendi
2. 6 Kas 2026 09:02Yayımlandı

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