What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-02 · updated 2026-10-26
• Weakness: CWE-266

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.

Affected products

• ChatGPTNextWeb NextChat: 2.16.0, 2.16.1

References

• https://github.com/ChatGPTNextWeb/NextChat/
• https://github.com/ChatGPTNextWeb/NextChat/issues/6757
• https://vuldb.com/submit/806851
• https://vuldb.com/vuln/360756
• https://vuldb.com/vuln/360756/cti

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