CVE-2026-18214

HighCVSS 8.1/10Last modified Sep 16, 2026

Description

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This means an attacker with a valid Google account from a different domain could bypass the security check and gain access to the Keycloak realm.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-862

Affected software

No affected versions have been published.

Timeline

Published: Jul 31, 2026
Last modified: Sep 16, 2026
NVD status: Modified

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