rootpwn

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
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