What’s Vulnerable › Vulnerabilities

CVE-2026-105209: ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey Enrollment

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-04 · updated 2026-10-29
• Weakness: CWE-862

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.

Affected products

• zitadel: from 4.0.0 before 4.17.1 — fixed in 4.17.1

How to fix

Upgrade to a fixed version: zitadel 4.17.1. Check the vendor advisory for mitigations.

References

• https://github.com/zitadel/zitadel/security/advisories/GHSA-pq2q-2c6r-75c4
• https://www.vulncheck.com/advisories/zitadel-before-3.4.15-and-4.17.1-cross-organization-account-takeover-via-passkey-enrollment

Get alerted when CVE-2026-105209 or the next vulnerability affects your stack