CVE-2026-121531
Umami 2FA Policy route.ts single-factor authentication
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Umami n/a |
3.3.* (affected) 3.4.0 (affected) 3.4.1 (affected) |
CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 6.3 medium |
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 | CNA: VulDB |
| 3.0 / 6.3 medium |
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C | CNA: VulDB |
| 2.0 / 6.5 medium |
AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C | CNA: VulDB |
| 4.0 / 2.1 low |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 6.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L | NVD: [email protected] |
| 2.0 / 6.5 medium |
AV:N/AC:L/Au:S/C:P/I:P/A:P | NVD: [email protected] |
Exploit evidence
References
- https://vuldb.com/vuln/430290CNA: VulDB · vdb-entry
- https://vuldb.com/vuln/430290/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-121531CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1019994CNA: VulDB · third-party-advisory
- https://github.com/waterhunter2000-svg/vulnerability-reportsCNA: VulDB · related
- https://github.com/umami-software/umami/security/advisories/GHSA-29fx-pxjg-35rmCNA: VulDB · broken-link
- https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/03-umami-enforced-2fa-not-applied.mdCNA: VulDB · exploit
- https://github.com/umami-software/umami/security/advisories/GHSA-29fx-pxjg-35rm[email protected]
- https://github.com/waterhunter2000-svg/vulnerability-reports[email protected]
- https://github.com/waterhunter2000-svg/vulnerability-reports/blob/main/03-umami-enforced-2fa-not-applied.md[email protected]
- https://vuldb.com/cve/CVE-2026-121531[email protected]
- https://vuldb.com/submit/1019994[email protected]
- https://vuldb.com/vuln/430290[email protected]
- https://vuldb.com/vuln/430290/cti[email protected]
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