External Control of Assumed-Immutable Web Parameter Affecting org.keycloak:keycloak-services package, versions [26.3.0,26.6.2)
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-16873880
- published24 May 2026
- disclosed19 May 2026
- creditUnknown
Introduced: 19 May 2026
CVE-2026-7571 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-services to version 26.6.2 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 External Control of Assumed-Immutable Web Parameter via the SessionCodeChecks restart flow in the login session handling code. An attacker can steer a restarted authentication session to an attacker-chosen URL by supplying a crafted client_data parameter with a different redirect_uri, causing the victim’s browser to be redirected to the attacker’s endpoint after login. This can send the user’s authorization response to the wrong location, exposing the login result to an untrusted site.
Note: While the fix was back-ported to version 26.4.12, this version has not been published to Maven Central