CVE-2026-121531

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    CVE-2026-121531

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: Umami 2FA Policy route.ts single-factor authentication

    Details: A vulnerability has been found in Umami 3.3.x/3.4.0/3.4.1. This affects an unknown part of the file src/app/api/auth/login/route.ts of the component 2FA Policy Handler. The manipulation leads to use of single-factor authentication. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121531.json, https://github.com/umami-software/umami/security/advisories/GHSA-29fx-pxjg-35rm, https://nvd.nist.gov/vuln/detail/CVE-2026-121531, https://vuldb.com/cve/CVE-2026-121531, https://vuldb.com/submit/1019994, https://vuldb.com/vuln/430290, https://vuldb.com/vuln/430290/cti, https://github.com/waterhunter2000-svg/vulnerability-reports, https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/03-umami-enforced-2fa-not-applied.md

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ba2aa48546534c55e9b8174667b4f266fe9d9ea2
    Fixed -None

    Affected versions

    3.3.*

    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-2026-121531 | CVE-DB