Authorization Bypass Through User-Controlled Key Affecting org.keycloak:keycloak-services package, versions [26.3.0,26.6.3)
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.
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- published21 May 2026
- disclosed20 May 2026
- creditUnknown
Introduced: 20 May 2026
CVE-2026-9087 (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 Authorization Bypass Through User-Controlled Key in the cross-session email verification process. An attacker can gain persistent access to another user's local account by consuming the verification proof when controlling an upstream identity provider account that shares an email address with the victim. This is only exploitable if the attacker controls an upstream identity provider account with the same email as the victim, the victim is actively linking their account, email verification is enabled, and the identity provider is configured with trustEmail=false.