Description (CNA)
A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.13-1 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-19 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-19 before * |
| Red Hat / Red Hat build of Keycloak 26.4.13 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6.3-3 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-6 before * |
| Red Hat / Red Hat build of Keycloak 26.6 | unaffected 26.6-6 before * |
| Red Hat / Red Hat build of Keycloak 26.6.3 | unaffected |
CWE
CWE-639
References
- https://access.redhat.com/errata/RHSA-2026:25097
- https://access.redhat.com/errata/RHSA-2026:25098
- https://access.redhat.com/errata/RHSA-2026:30049
- https://access.redhat.com/errata/RHSA-2026:30050
- https://access.redhat.com/security/cve/CVE-2026-9087
- https://bugzilla.redhat.com/show_bug.cgi?id=2480172
ADP enrichment
No English description supplied.
No references supplied.