Reliance on Untrusted Inputs in a Security Decision Affecting org.keycloak:keycloak-server-spi-private package, versions [13.0.0,26.7.3)
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-19477241
- published1 Sept 2026
- disclosed16 Jul 2026
- creditPaul Bottinelli
Introduced: 16 Jul 2026
CVE-2026-16093 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-server-spi-private to version 26.7.3 or higher.
Overview
org.keycloak:keycloak-server-spi-private is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to Reliance on Untrusted Inputs in a Security Decision through the client authentication flow in the client policies and assertion handling components. An attacker can authenticate with weaker client credentials by supplying a fake unsigned assertion header that makes the server believe the policy requirements have been satisfied. This defeats administrator-mandated requirements for signed JWT assertions and lets a client complete authentication with a simpler method such as a client secret, weakening client authentication controls.