CVE-2026-105211
ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows…
- Risk score
- 59/100
- CVSS
- 8.1 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 4 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 re…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.17.1 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.1 high
- Remotely exploitable without logging in
References
Original 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.
Last activity 4 Oct 2026. Patch Forecast updates every hour.