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CVE-2026-9087

MEDIUM CVSS: 6.4 Published: 2026-05-20 Modified: 2026-07-23

Description

A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account.

Affected Platforms

Redhat Build Of Keycloak

Weakness Type

CWE-639

References