Starting from 2.53.6, 2.54.3, and 2.55.0, Zitadel only required multi factor authentication in case the login policy has either enabled requireMFA or requireMFAForLocalUsers. If a user has set up MFA without this requirement, Zitadel would consider single factor auhtenticated sessions as valid as well and not require multiple factors. Bypassing second authentication factors weakens multifactor authentication and enables attackers to bypass the more secure factor. An attacker can target the TOTP code alone, only six digits, bypassing password verification entirely and potentially compromising accounts with 2FA enabled. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/zitadel/zitadel/commit/b284f8474eed0cba531905101619e7ae7963156b Patch
- https://github.com/zitadel/zitadel/security/advisories/GHSA-cfjq-28r2-4jv5 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.7 · zitadelNVD modified 2026-10-19 13:10
Affected (CPE criteria) 1
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*