CVE-2026-105210

8.2 HIGHpublic exploit available

Published 2026-10-04 · Updated 2026-10-05

AI risk analysis

Summary: The flaw allows attackers to enroll second-factor authentication methods without proper primary factor verification, posing a significant risk to user accounts.
Exploitability: Exploitation is relatively easy given that attackers only need to know the victim's login name. Precondition is access to the victim's login name.
Blast radius: If exploited, attackers can overwrite verified phone numbers and enumerate users, leading to potential account compromise and data leakage.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to ZITADEL 3.4.15 or 4.17.1 or later.

auth-bypasswebuilogin

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Weaknesses

CWE-287

Public exploit & PoC references

https://github.com/zitadel/zitadel/security/advisories/GHSA-72q5-mv5c-vxv4

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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