Umami 3.3.x/3.4.0/3.4.1 2FA Policy route.ts single-factor authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k2.41

Summaryinfo

A vulnerability classified as critical was found in Umami 3.3.x/3.4.0/3.4.1. This vulnerability affects unknown code of the file src/app/api/auth/login/route.ts of the component 2FA Policy Handler. The manipulation results in use of single-factor authentication. This vulnerability is known as CVE-2026-121531. It is possible to launch the attack remotely. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical has been found in Umami 3.3.x/3.4.0/3.4.1. Affected is an unknown function of the file src/app/api/auth/login/route.ts of the component 2FA Policy Handler. The manipulation with an unknown input leads to a use of single-factor authentication vulnerability. CWE is classifying the issue as CWE-308. The use of single-factor authentication can lead to unnecessary risk of compromise when compared with the benefits of a dual-factor authentication scheme. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-121531. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and a public exploit are known. This vulnerability is assigned to T1111 by the MITRE ATT&CK project.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use of single-factor authentication
CWE: CWE-308 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/03/2026 Advisory disclosed
11/03/2026 +0 days VulDB entry created
11/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-29fx-pxjg-35rm
Status: Confirmed
Confirmation: 🔒

CNA: VulDB
CVE: CVE-2026-121531 (🔒)

GCVE (CVE): GCVE-0-2026-121531
GCVE (VulDB): GCVE-100-430290
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/03/2026 15:38
Changes: 11/03/2026 15:38 (57)
Complete: 🔍
Submitter: waterhunter
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1019994: umami-software umami 3.4.0 Improper Authentication (by waterhunter)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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