Description
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.
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| build-of-keycloak | 26.4 | 26.4.12 |
| org.keycloak:keycloak-services | โ | 26.6.2 |
| unknown | โ | โ |
References
Similar Threats
- Medium CVE-2026-37978
- Low CVE-2026-37977
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