CVE-2025-12390
Published: Oct 28, 2025
Modified: Jan 6, 2026
CVSS v3.1
6.0
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Keycloak | keycloak | affected 0 - < 26.0.0 |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2.11-1 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-12 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-12 - < * |
Red Hat | Red Hat build of Keycloak 26.2.11 | All versions |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4.4-1 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-3 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-3 - < * |
Red Hat | Red Hat build of Keycloak 26.4.4 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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