A flaw was found in Keycloak. An active keycloak session can be hijacked by initiating a new authentication (having the query parameter prompt=login) and forcing the user to enter his credentials once again. If the user cancels this re-authentication by clicking Restart login, the account takeover could take place as the new session, with a different SUB, will have the same SID as the previous session.
References:- https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj
- https://nvd.nist.gov/vuln/detail/CVE-2023-6787
- https://access.redhat.com/errata/RHSA-2024:1867
- https://access.redhat.com/errata/RHSA-2024:1868
- https://access.redhat.com/security/cve/CVE-2023-6787
- https://bugzilla.redhat.com/show_bug.cgi?id=2254375
- https://github.com/advisories/GHSA-c9h6-v78w-52wj