CVE-2026-92358 — Keycloak-services: keycloak-services: residual cross-browser account-link proof allows silent re-linking
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 t…
Published: 2026-09-16 · CVSS: 6.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7