CVE-2026-7644 ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization
Attackers can exploit improper authorization in the addMcpServer function to perform unauthorized actions, potentially leading to privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7644?
CVE-2026-7644 is a medium-severity missing authorization vulnerability in ChatGPTNextWeb NextChat, published on 2 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-7644?
How do I fix CVE-2026-7644?
No fix has been published for CVE-2026-7644 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-7644 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7644 exists.
Sources
Also known as GHSA-2jqp-6hx7-phh8.