Authorization Bypass Through User-Controlled Key Affecting keycloak package, versions <26.6.2-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAK-17207289
  • published6 Jun 2026
  • disclosed19 May 2026

Introduced: 19 May 2026

NewCVE-2026-37978  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade Minimos:latest keycloak to version 26.6.2-r0 or higher.

NVD Description

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

A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.

CVSS Base Scores

version 3.1