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freegpt-webui CVE-2026-85702

| EUVDEUVD-2026-71750 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-09-04 VulDB GHSA-ghpx-52p8-x9h5
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
5.5 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
vuln.today AI
7.3 HIGH

Fully unauthenticated network exploitation (PR:N, AV:N); impact limited to low C/I/A as the endpoint exposes conversation API only, not system access.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
CVSS changed
Sep 04, 2026 - 21:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
Analysis Generated
Sep 04, 2026 - 21:20 vuln.today
CVE Published
Sep 04, 2026 - 20:30 cve.org
MEDIUM 6.9

DescriptionCVE.org

A security vulnerability has been detected in ramon-victor freegpt-webui up to 098db3dfeb41555c2ca9269df0f13e10ec1c35dc. Affected is the function _conversation of the file server/backend.py of the component Backend Conversation API. Such manipulation of the argument model leads to missing authentication. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. This vulnerability only affects products that are no longer supported by the maintainer.

AnalysisAI

Unauthenticated access to the Backend Conversation API in ramon-victor/freegpt-webui allows remote attackers to invoke the _conversation function without valid credentials by manipulating the model argument in HTTP requests to server/backend.py. The affected codebase is a rolling-release hobby project that has been abandoned by its maintainer, meaning no patch will be issued. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation No special conditions are required for network-reachable instances: the vulnerability exists in the default configuration of freegpt-webui because the `_conversation` function in `server/backend.py` does not enforce authentication on the Backend Conversation API endpoint. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.9 with VC:L/VI:L/VA:L reflects a moderate, bounded impact - unauthorized access to the conversation API rather than full system compromise. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch identified at time of analysis - the project is abandoned and no fix will be issued. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-85702 vulnerability details – vuln.today

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