Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| zitadel | zitadel | >= 4.0.0-rc.1, < 4.6.0, >= 3.0.0-rc.1, < 3.4.3, >= 2.55.0, < 2.71.18, >= 2.54.3, <= 2.54.10, >= 2.53.6, <= 2.53.9 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20251105T184115-1.1 | openSUSE-SU-2025:15710-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/zitadel/zitadel | < 1.80.0-v2.20.0.20251029091250-b284f8474eed | 1.80.0-v2.20.0.20251029091250-b284f8474eed | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel | all versions | — | GO-2025-4083 |
| Go | github.com/zitadel/zitadel/v2 | >= 2.53.6, <= 2.53.9 | — | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel/v2 | >= 2.54.3, <= 2.54.10 | — | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel/v2 | >= 2.55.0, < 2.71.18 | 2.71.18 | GHSA-cfjq-28r2-4jv5 |
Advisories 2
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- openSUSE-SU-2025:15710-1 govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026