critical9.8
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 without verifying a primary factor or …
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| ZITADEL 3.0.0 | through 3.4.15 |
| 4.0.0 | before 4.17.3 |
Versions were read from the advisory text. No structured product data has been published for this record yet.