CVE-2026-105211ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCode
Updated under an hour ago ()
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It affects zitadel. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.33%, higher than 25% of scored CVEs.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.33% (percentile 25)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
zitadel zitadel zitadel:zitadel (from the name) | before 4.17.1; 4.17.1 not affected | CNA record |
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-3gwm-5wx8-4gm6vendor-advisory
- https://www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-login-v2-otp-returncodethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.