CVE-2026-105207
CRITICAL
CVSS 9.8
Published: 2026-10-04
Modified: 2026-10-04
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Threat Intelligence Pending
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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.
Quick Facts
| CVE ID | CVE-2026-105207 |
| CVSS Score | 9.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2026-10-04 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |