CVE-2026-105209 ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey Enrollment
Attackers with user-write permissions in one organization can take over accounts in other organizations by exploiting improper authorization in passkey enrollment.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105209?
CVE-2026-105209 is a critical missing authorization vulnerability in zitadel, published on 4 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains an improper authorization vulnerability: when issuing passkey or passwordless enrollment codes, it checks only the organization in the x-zitadel-orgid header, not the target user's organization. Attackers with user-write permission in one organization can obtain an enrollment code for a user in another organization on the same instance and register their own authenticator to take over that account.
Weakness: CWE-862
Which versions are affected by CVE-2026-105209?
How do I fix CVE-2026-105209?
No fix has been published for CVE-2026-105209 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105209 being exploited?
There is no known exploitation of CVE-2026-105209 in the wild and no public exploit code.
Sources
Also known as GHSA-hcch-574x-xrm8, GHSA-pq2q-2c6r-75c4.