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9.3

ZITADEL allows cross‑org account takeover via passkey enrollment

CVE-2026-105209 · published 14 days ago
Summary

Versions of ZITADEL before 3.4.15 and 4.17.1 let a user with write permission in one organization obtain a password‑less enrollment code for a user in a different organization on the same server. This lets the attacker register their own authentication device and take over the other user's account. Update ZITADEL to the latest version or apply the vendor’s patch to fix the authorization check.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
zitadel zitadel < 4.17.1
< 3.4.15
Original advisory text
ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey Enrollment
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
9.3 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-862Missing Authorization
Timeline
Published4 Oct 2026
Updated15 Oct 2026
First seen4 Oct 2026
Sources
CVE-2026-105209 · NVD
CVE-2026-105209 · OSV
GHSA-pq2q-2c6r-75c4 · GHSA
CVE-2026-105209 · MITRE
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