Incorrect Implementation of Authentication Algorithm Affecting org.keycloak:keycloak-services package, versions [9.0.0,26.6.3)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JAVA-ORGKEYCLOAK-16875076
- published26 May 2026
- disclosed19 May 2026
- creditUnknown
Introduced: 19 May 2026
CVE-2026-8922 (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 Incorrect Implementation of Authentication Algorithm through the TokenManager and OIDC endpoint token checks in the access token introspection, refresh token, and userinfo paths. An attacker can keep using a token after a realm-level not-before event by presenting it to introspection, refresh, or userinfo requests when client-level not-before values are also in play. This lets revoked or otherwise invalidated tokens remain accepted, allowing continued access to protected account, userinfo, and token-refresh operations until the token expires.