Improper Restriction of Security Token Assignment Affecting org.keycloak:keycloak-services package, versions [26.5.2,26.5.3)
Threat Intelligence
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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-15253602
- published10 Feb 2026
- disclosed9 Feb 2026
- creditUnknown
Introduced: 9 Feb 2026
CVE-2026-1609 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-services to version 26.5.3 or higher.
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 Restriction of Security Token Assignment due to improper enforcement of user disabled-state checks in the grant preview feature. An attacker can gain unauthorized access to sensitive resources by presenting a valid assertion token from an external identity provider for a disabled user account. This is only exploitable if the jwt-authorization-grant preview feature is explicitly enabled.