TI-2026-67546 Aliases CVE-2026-105210 GHSA-j55w-p4wc-frwh

ZITADEL before 4.17.1 Unauthenticated MFA Enrollment via Login V1 Init Handlers

MEDIUM 44CWE-287Published 2026-10-04 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · High · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains a missing authentication flaw in the hosted Login V1 UI, whose second-factor enrollment and initialization handlers act on an identify-only session before any primary factor is verified. Attackers knowing only a victim's login name can enroll attacker-controlled TOTP, OTP-SMS, OTP-Email, or U2F factors, overwrite the verified phone number, and enumerate users through discrepant errors.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00236 14th percentileScored 2026-11-07

Fix Fixed zitadel (zitadel): 4.17.1, 3.4.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
zitadel	zitadel	4.0.0 to before 4.17.1	4.17.1	Patch available	CNA
zitadel	zitadel	before 3.4.15	3.4.15	Patch available	CNA

zitadel Vendorzitadel Affected 4.0.0 to before 4.17.1 Fixed in 4.17.1 Patch available CNA
zitadel Vendorzitadel Affected before 3.4.15 Fixed in 3.4.15 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:zitadel:zitadel::::::::	—	—	zitadel

cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* Versions — — ·zitadel

Remediation

Fix · CNA zitadel (zitadel) Fixed in 4.17.1
Fix · CNA zitadel (zitadel) Fixed in 3.4.15

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-04
zitadel 4.17.1
4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-67549 ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated OrganizationsPriority MEDIUM 44
- TI-2026-67547 ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCodePriority MEDIUM 42
- TI-2026-67545 ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey EnrollmentPriority LOW 39
Show all 4 records →
Release · 2026-10-04
zitadel 3.4.15
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-67545 ZITADEL before 3.4.15 and 4.17.1 Cross-Organization Account Takeover via Passkey EnrollmentPriority LOW 39
Show all 2 records →

Timeline

2026-10-04 Threatist record created from CVE-2026-105210
2026-10-04 Alias added: GHSA-j55w-p4wc-frwh
2026-10-05 CISA SSVC decision points changed
2026-10-29 Affected versions changed · CNA

References

Advisory 1

GitHub Security Advisory (GHSA-72q5-mv5c-vxv4)

TI-2024-26607 ZITADEL Vulnerable to Session Information Leakage CVSS 3.1MEDIUM 6.5
TI-2026-67551 ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback CVSS 4.0CRITICAL 9.3
TI-2026-67543 ZITADEL before 4.17.3 Account Takeover via External IdP Linking CVSS 4.0CRITICAL 9.3
TI-2025-41253 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login CVSS 3.1CRITICAL 9.3
TI-2025-39554 Zitadel Bypass Second Authentication Factor CVSS 4.0HIGH 8.7
TI-2026-82647 ZITADEL Login V2 flaw lets attackers approve device authorizations CVSS 4.0HIGH 8.6

See all 77 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences