CVE-2026-92358
MEDIUM
NVD
CVSS Score
6.4
Severity
MEDIUM
Published
Sep 16, 2026
Vendor
unknown
Description
A flaw was found in the first broker login flow of Keycloak. When a user confirms an account-linking request from a different browser, a temporary proof is created to validate the link. However, this proof is not properly cleared after the link is established or when the user later manually removes the link. An attacker who controls the external identity can exploit this leftover proof to silently re-establish the link and gain unauthorized access to the victims account without any further confirmation.