EUVD-2026-30886
GHSA-w4p5-rfh6-cwrv
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Lifecycle Timeline
1DescriptionNVD
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay ExecuteActionsActionToken tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.
AnalysisAI
Token replay exploitation in Red Hat Build of Keycloak's WebAuthn flow allows an unauthenticated remote attacker who intercepts an ExecuteActionsActionToken email link to enroll their own hardware-backed WebAuthn authenticator to a victim's account. Successful exploitation bypasses authentication entirely and grants the attacker persistent, credential-backed access to the compromised account. …
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