External Control of Assumed-Immutable Web Parameter Affecting keycloak package, versions <26.6.2-r0


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.01% (3rd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAK-17201070
  • published6 Jun 2026
  • disclosed19 May 2026

Introduced: 19 May 2026

NewCVE-2026-7571  (opens in a new tab)
CWE-472  (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 user, with knowledge of user credentials and client ID, can bypass a security control intended to disable the implicit flow in OpenID Connect (OIDC) clients. By manipulating client data during a session restart, an attacker can obtain an access token that should not be available. This vulnerability can also lead to the exposure of these access tokens in server logs, proxy logs, and HTTP Referrer headers, resulting in sensitive information disclosure.

CVSS Base Scores

version 3.1