CRITICAL 9.3 NVD
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 t
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.
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-g8gj-gq47-xgf4
- https://www.vulncheck.com/advisories/zitadel-before-4.17.3-account-takeover-via-external-i
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-10-04 via NVD.
Risk Timeline
CVE Disclosed2026-10-04 · -1 days ago
Remediation Resources
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