Access Control Bypass Affecting org.keycloak:keycloak-services package, versions [0,]
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-18752081
- published13 Aug 2026
- disclosed16 Jul 2026
- creditjohanw
Introduced: 16 Jul 2026
CVE-2026-16103 (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 Access Control Bypass through the Client-Initiated Backchannel Authentication token redemption handler in the keycloak-services component. An attacker can obtain access and refresh tokens for a locked user account by redeeming a previously started CIBA authentication request after the account has been locked, provided the request was approved by the user and the attacker has valid client credentials. The vulnerable code path lets token redemption proceed even when brute-force protection has already locked the account. This leaves users exposed to unauthorized token issuance for accounts that were expected to be blocked, undermining the lockout’s protection against continued authentication attempts.