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.
Metrics
Affected Vendors & Products
References
History
Tue, 06 Oct 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Sun, 04 Oct 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | ZITADEL before 4.17.3 Account Takeover via External IdP Linking | |
| First Time appeared |
Zitadel
Zitadel zitadel |
|
| Weaknesses | CWE-306 | |
| CPEs | cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Zitadel
Zitadel zitadel |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-04T13:10:02.024Z
Updated: 2026-10-06T21:58:40.367Z
Reserved: 2026-10-04T13:02:21.188Z
Link: CVE-2026-105207
Updated: 2026-10-06T21:58:36.245Z
Status : Deferred
Published: 2026-10-04T15:16:31.677
Modified: 2026-10-06T22:17:02.023
Link: CVE-2026-105207
No data.