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CVE-2026-9087
MEDIUM(6.4)CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Risk Signal Score16/100 — NIEDRIG
- CVSS 6.4 — Mittel
EPSS-Score
0%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
6.4
Technische Schwere
Beschreibung
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.
GitHub Advisories
GHSA-m6qj-3mpp-57v8MEDIUM
Keycloak: Insufficient verification proof scoping enables identity provider account linking attack and account compromise
maven/org.keycloak:keycloak-services→ 26.6.3
GitHub Advisory