Improper Authentication Affecting org.keycloak:keycloak-services package, versions [3.4.0.CR1,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGKEYCLOAK-18752074
- published13 Aug 2026
- disclosed28 Jul 2026
- creditPaul Bottinelli
Introduced: 28 Jul 2026
NewCVE-2026-18215 (opens in a new tab)How to fix?
There is no fixed version for org.keycloak:keycloak-services.
Overview
org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to Improper Authentication through the Microsoft account token exchange flow in the Microsoft identity provider component. An attacker can gain unauthorized access to a Keycloak realm by supplying a valid Microsoft token from a different organization and exchanging it. This bypasses the tenant restriction intended to limit logins to a specific Microsoft organization, allowing access to sensitive data and unauthorized actions in deployments that rely on that restriction.