Session Fixation Affecting keycloak-25 package, versions <25.0.6+e1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-ECHOLATEST-KEYCLOAK25-19435075
  • published31 Aug 2026
  • disclosed28 Oct 2025

Introduced: 28 Oct 2025

CVE-2025-12390  (opens in a new tab)
CWE-384  (opens in a new tab)

How to fix?

Upgrade Echo:latest keycloak-25 to version 25.0.6+e1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak-25 package and not the keycloak-25 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1