critical · CVSS v3 9.8 · CVSS v4 9.3
CVE-2026-105207
ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.17.3 creates links between user accounts and external identity providers…
Description
ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.17.3 creates links between user accounts and external identity providers without verifying a primary factor or the caller's permission, including on identify-only Login V2 sessions and via the User Service V2 AddIDPLink endpoint. An unauthenticated attacker knowing a victim's login name can bind their own external IdP identity to the victim's account and then sign in as the victim.
Scores
- Severity
- critical
- CVSS v2
- 10
- CVSS v3
- 9.8
- CVSS v4
- 9.3
- EPSS
- —