CVE-2026-7643 ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy
Attackers can bypass cross-domain policies in NextChat API endpoints, potentially enabling unauthorized cross-origin requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-7643?
CVE-2026-7643 is a medium-severity vulnerability in ChatGPTNextWeb NextChat, published on 2 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This impacts an unknown function of the file Next.js of the component API Endpoint. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The exploit has been published 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-2026-7643?
How do I fix CVE-2026-7643?
No fix has been published for CVE-2026-7643 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-7643 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7643 exists.
Sources
Also known as GHSA-cv87-px3c-7h2j.