Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109374ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

Medium 5.5

In plain English

A medium-severity incorrect authorization in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.2%top 88.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
zitadel	zitadel	3.0.0 – before 4.19.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

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 Impersonation third-party-advisory