CVE-2025-12390

—

CVSS 3.1

6.0 medium

EPSS

<1%p3

Published

Oct 28, 2025 (Oct 28, 2025)

Modified

Jun 17, 2026

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.

Weakness: CWE-384
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.1%)

In the news0 stories

No ingested article mentions this CVE yet.