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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.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-02 | Updated 2026-05-04 | Assigner VulDB




MEDIUM: 6.9CVSS: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
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Improper Authorization

Incorrect Privilege Assignment

Product status

2.16.0
affected

2.16.1
affected

Timeline

2026-05-01:Advisory disclosed
2026-05-01:VulDB entry created
2026-05-01:VulDB entry last update

Credits

Yu.Bao (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360756 (VDB-360756 | ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization) vdb-entry technical-description

vuldb.com/vuln/360756/cti (VDB-360756 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/806851 (Submit #806851 | ChatGPTNextWeb NextChat 2.16.1 Unauthenticated Remote Code Execution) third-party-advisory

github.com/ChatGPTNextWeb/NextChat/issues/6757 exploit issue-tracking

github.com/ChatGPTNextWeb/NextChat/ product

cve.org (CVE-2026-7644)

nvd.nist.gov (CVE-2026-7644)

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