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.
Metrics
CVSS 3.1 6.4/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:NWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Single Sign-On 7 | — |
References
Timeline
- Published
- Sep 16, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Awaiting Analysis