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.
CVE-2026-37982
CVSS base score
6.8 (v3.1)
Severity
MEDIUM
Attack vector
Network
Weakness
CWE-294
Last modified
October 29, 2026
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
redhat build of keycloak
References
- access.redhat.com Vendor Advisory
- access.redhat.com Vendor Advisory
- access.redhat.com Vendor Advisory
- bugzilla.redhat.com Vendor Advisory