CVE-2026-37982

MEDIUM6.8

Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay

Published May 19, 2026

Modified 1 months ago

Details

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.

References

ADVISORY

https://access.redhat.com/errata/RHSA-2026:19596

ADVISORY

https://access.redhat.com/errata/RHSA-2026:19597

WEB

https://access.redhat.com/security/cve/CVE-2026-37982

WEB

https://bugzilla.redhat.com/show_bug.cgi?id=2455329

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-37982

CVSS Analysis