Missing Authentication in Ramon-Victor FreeGPT-WebUI Backend API
CVE-2026-85702

6.9MEDIUM

Key Information:

Vendor

Ramon-victor

Status
Freegpt-webui
Vendor
CVE Published:
4 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-85702?

A security issue exists in the Ramon-Victor FreeGPT-WebUI that affects the Backend Conversation API, specifically the _conversation function in server/backend.py. This vulnerability allows an attacker to manipulate the model argument, which can result in missing authentication checks. The exploit can be executed remotely, exposing users to potential unauthorized access. As this product follows a rolling release model, it continuously integrates updates, yet the specific versions impacted are not disclosed. It's important to note that this vulnerability is only relevant for versions no longer maintained by the developer.

Affected Version(s)

freegpt-webui 098db3dfeb41555c2ca9269df0f13e10ec1c35dc

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-2026-85702 - Proof of Concept

References

https://vuldb.com/vuln/398805
vdb-entrytechnical-description
https://vuldb.com/vuln/398805/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-85702
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

Galaxyn (VulDB User)
.