CVE-2026-109374

CVSS 5.5 (medium) · published 2026-10-12

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.

Weakness: CWE-863

Source: NVD CVE-2026-109374

References

• https://github.com/zitadel/zitadel/security/advisories/GHSA-w4gv-rcwj-w6r5
• https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-privilege-escalation-via-oidc-token-exchange-impersonation

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