CVE-2026-7644
ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization
- State
- Published
- Severity
- 6.9 Medium
- Published
- May 2, 2026
- Updated
- May 4, 2026
- Reserved
- May 1, 2026
Description
A vulnerability has been found in ChatGPTNextWeb NextChat up to 2.16.1. Affected is the function addMcpServer of the file app/mcp/actions.ts. The manipulation leads to improper authorization. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 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 | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
NextChatChatGPTNextWeb |
|
References
- VDB-360756 | ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorizationvdb-entrytechnical-description
- VDB-360756 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #806851 | ChatGPTNextWeb NextChat 2.16.1 Unauthenticated Remote Code Executionthird-party-advisory
- https://github.com/ChatGPTNextWeb/NextChat/issues/6757exploitissue-tracking
- https://github.com/ChatGPTNextWeb/NextChat/product
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