Description (CNA)
A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Keycloak / keycloak | affected 0 before 26.0.0 |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2.11-1 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-12 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-12 before * |
| Red Hat / Red Hat build of Keycloak 26.2.11 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.4-1 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-3 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-3 before * |
| Red Hat / Red Hat build of Keycloak 26.4.4 | unaffected |
CWE
CWE-384
References
- https://access.redhat.com/errata/RHSA-2025:21370
- https://access.redhat.com/errata/RHSA-2025:21371
- https://access.redhat.com/errata/RHSA-2025:22088
- https://access.redhat.com/errata/RHSA-2025:22089
- https://access.redhat.com/security/cve/CVE-2025-12390
- https://bugzilla.redhat.com/show_bug.cgi?id=2406793
- https://github.com/keycloak/keycloak/issues/43853
ADP enrichment
No English description supplied.
No references supplied.