User Impersonation Affecting org.keycloak:keycloak-services package, versions [4.0.0.Beta1 ,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-16874144
- published25 May 2026
- disclosed19 May 2026
- creditUnknown
Introduced: 19 May 2026
CVE-2026-7507 (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 User Impersonation through the SessionCodeChecks logic in SessionCodeChecks.java. An attacker can reuse an auth_session_id and related login-action parameters from a different browser session to reach the authentication flow and trigger login or required-action processing without the expected session-cookie match. This lets the attacker force the server to accept a mismatched authentication session, resulting in unauthorized access to the login action flow and potential account takeover or session confusion for the victim.
Note: While the fix was back-ported to version 26.4.12, this version has not been published to Maven Central