CVE-2026-109374

ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

State: Published
Severity: 5.1 Medium
Published: Oct 12, 2026
Updated: Oct 13, 2026
Reserved: Oct 12, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	5.5 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
zitadelzitadel	3.0.0 to before 4.19.2Affected 4.19.2Not affected

References

GitHub Security Advisory (GHSA-w4gv-rcwj-w6r5)vendor-advisory
VulnCheck Advisory: ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonationthird-party-advisory

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