VULNERABILITY INTELLIGENCE

CVE-2026-9087

CVSS score6.4 MEDIUM
EPSS probability0.31%
CISA KEVNot currently listed
Published2026-05-20
Last modified2026-07-23
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

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.

Weakness classification

  • secalert@redhat.com: CWE-639

Primary references