CVE-2026-119128

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    CVE-2026-119128

    Published: 29 Oct 2026Last Modified: 5 Nov 2026

    Summary: ZITADEL 4.0.0 before 4.19.5 Login V2 Account Takeover via Forgeable verificationCheck Cookie

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119128.json, https://github.com/zitadel/zitadel/security/advisories/GHSA-84fg-x5h4-w8xv, https://nvd.nist.gov/vuln/detail/CVE-2026-119128, https://www.vulncheck.com/advisories/zitadel-4.0.0-before-4.19.5-login-v2-account-takeover-via-forgeable-verificationcheck-cookie

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c86c60bab86b64b44755d2776703939c01686055
    Fixed -a618740b578627b7b9acbbb111a6948882d6f5dc

    Affected versions

    v4.19.4
    v4.19.3
    v4.19.2
    v4.19.1
    v4.19.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-119128 | CVE-DB