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CVE-2026-105207 - ZITADEL before 4.17.3 Account Takeover via External IdP Linking

CVE ID : CVE-2026-105207 Published : Oct. 4, 2026, 3:16 p. m. • 4 hours, 15 minutes ago 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. Severity: 9.8 • CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...