CVE-2026-121531

MEDIUM 6.3

Umami 2FA Policy route.ts single-factor authentication

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-308 CWE-287
Vendor	n/a
Product	umami
Published	Nov 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / Umami

3.3.* 3.4.0 3.4.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/430290 vuldb.com: https://vuldb.com/vuln/430290/cti vuldb.com: https://vuldb.com/cve/CVE-2026-121531 vuldb.com: https://vuldb.com/submit/1019994 github.com: https://github.com/waterhunter2000-svg/vulnerability-reports github.com: https://github.com/umami-software/umami/security/advisories/GHSA-29fx-pxjg-35rm github.com: https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/03-umami-enforced-2fa-not-applied.md

Credits

🔍 waterhunter (VulDB User) VulDB CNA Team