Authentication Bypass by Primary Weakness Affecting org.keycloak:keycloak-services package, versions [,26.6.3)
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-17082678
- published29 May 2026
- disclosed28 May 2026
- creditEvan Hendra
Introduced: 28 May 2026
CVE-2026-9798 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-services to version 26.6.3 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 Authentication Bypass by Primary Weakness via the Client-Initiated Backchannel Authentication (CIBA) flow. An attacker can continue authentication attempts and obtain tokens by exploiting the CIBA flow even when a user account is locked due to brute-force protection. This is only exploitable if CIBA is explicitly enabled and configured, and the user approves the authentication request on their device.