critical · CVSS v3 8.1 · CVSS v4 9.2
CVE-2026-105211
ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows unauthenticated attackers …
Description
ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows unauthenticated attackers to take over accounts by obtaining OTP codes via the returnCode delivery type. Attackers knowing a login name of a victim with OTP-Email and OTP-SMS enrolled can read both codes from server-action responses to gain MFA-authenticated sessions, including administrator takeover.
Scores
- Severity
- critical
- CVSS v2
- 7.6
- CVSS v3
- 8.1
- CVSS v4
- 9.2
- EPSS
- —