CVE-2026-109374

MEDIUM 5.5

ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-863
Vendor	zitadel
Product	zitadel
Published	Oct 12, 2026

Stay Ahead of the Next One

Get instant alerts for zitadel zitadel

Be the first to know when new medium vulnerabilities affecting zitadel zitadel are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

zitadel / zitadel

3.0.0 < 4.19.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

IAM-marco livio-a