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Medium · 5.5 CVE-2026-109374 EUVD-2026-97672GHSA-7j9c-5h49-hq7h

ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

Published Oct 12, 2026 · Updated Oct 13, 2026 · Assigned by VulnCheck

Description

ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows end-user impersonators to impersonate administrators including IAM_OWNER by bypassing the admin.impersonation check. Attackers holding IAM_END_USER_IMPERSONATOR or ORG_END_USER_IMPERSONATOR roles can sign in to relying applications as administrators with their roles and claims.

Affected products

VendorProductAffectedFixed
zitadel zitadel 3.0.0 – < 4.19.2 4.19.2

References