Authorization Bypass Vulnerability in 6amTech 6valley Social Login Flow
CVE-2026-122019

6.9MEDIUM

Key Information:

Vendor

6amtech

Status
6valley
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-122019?

A vulnerability exists in the social login flow of 6amTech's 6valley version 16.0, specifically in the existingAccountCheck function located in the /api/v1/auth/existing-account-check endpoint. This vulnerability allows an attacker to manipulate the user_response argument, potentially leading to unauthorized access to user accounts. The attack can be executed remotely, and due to the availability of public exploit resources, it poses a significant risk to systems utilizing this component.

Affected Version(s)

6valley 16.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-122019 - Proof of Concept

References

https://vuldb.com/vuln/431085
vdb-entrytechnical-description
https://vuldb.com/vuln/431085/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-122019
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

havel8964 (VulDB User)
.