CVE-2026-7644 MEDIUM

CVE-2026-7644: ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization

Vendor Chatgptnextweb
Product NextChat
Weakness CWE-285
Published May 2, 2026
Last update May 4, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 2, 2026 CVE published
May 4, 2026 Record updated