CVE-2026-7644

ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization

MEDIUM 5.5EPSS 0.5%

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: ChatGPTNextWeb · NextChat
CVSS v4.0 VULDB: 5.5 MEDIUMCVSS: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
CVSS v3.1 VULDB: 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v2.0 VULDB: 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS: 0.51% chance of exploitation in the next 30 days, 42nd percentile
Published: 2026-05-02
Updated: 2026-05-04

Proof-of-concept exploits (1)

ChatGPTNextWeb/NextChat/issues/675788853★ · 2026-10-15

CVE-2026-7644

Proof-of-concept exploits (1)

References

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