Zitadel
CVE-2026-119128: ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to set the first credential
CVE-2026-119128 Oct 29, 2026 Source: Vendor
ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to set the first credential of users lacking any authentication method. Attackers can compute a valid verificationCheck cookie from the user ID and browser fingerprint to set a password, register a passkey, or link an identity provider, taking over the account.
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-119128
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CVE-2026-119128
BR2026-0000-038229
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Credited as AdamKorcz
CVE-2026-119128
BR2026-0000-038230
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Credited as knQzx