CVE-2026-105211

ZITADEL versions before 4.17.1 are vulnerable to an authentication bypass in Login V2 . This flaw allows unauthenticated attackers to intercept OTP codes delivered via the returnCode delivery type. By knowing a victim's login name who has OTP-Email and OTP-SMS enrolled, an attacker can read both ...

EUVD-2026-92104

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...

CVE-2026-105211 ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCode

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...

PT-2026-104635

Name of the Vulnerable Software and Affected Versions ZITADEL versions prior to 4.17.1 Description An authentication bypass exists in Login V2 that allows unauthenticated attackers to take over accounts. Attackers who know the login name of a victim enrolled in OTP-Email and OTP-SMS can obtain...

CVE-2025-48375 Schule Missing Rate Limiting on OTP Email Requests – Susceptible to Abuse & DoS

Schule is open-source school management system software. Prior to version 1.0.1, the file forgotpassword.php or equivalent endpoint responsible for email-based OTP generation lacks proper rate limiting controls, allowing attackers to abuse the OTP request functionality. This vulnerability can be...