Privilege Escalation Vulnerability in ZITADEL by ZITADEL
CVE-2026-109374

5.1MEDIUM

Key Information:

Vendor

Zitadel

Status
Zitadel
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109374?

ZITADEL versions prior to 4.19.2 contain a vulnerability in the OIDC token exchange mechanism, allowing attackers with specific roles to impersonate administrators. This vulnerability enables unauthorized users to bypass critical checks, granting them admin-level access to relied applications. Attackers leveraging the IAM_END_USER_IMPERSONATOR or ORG_END_USER_IMPERSONATOR roles can exploit this flaw, posing significant risks to system integrity and security.

Affected Version(s)

zitadel 3.0.0 < 4.19.2

zitadel 4.19.2

References

https://github.com/zitadel/zitadel/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/zitadel-3.0.0-before...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

IAM-marco
livio-a
.