Vulnerability · Published May 2, 2026 · Assigned by VulDB
CVE-2026-7643ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy
Medium 4.3
In plain English
A medium-severity security flaw in NextChat from ChatGPTNextWeb. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ChatGPTNextWeb | NextChat | 2.16.02.16.1 |
Weakness: CWE-942, CWE-346 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
References
- VDB-360755 | ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy vdb-entry
- VDB-360755 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #806833 | ChatGPTNextWeb NextChat 2.16.1 Permissive CORS Wildcard Policy third-party-advisory
- https://github.com/ChatGPTNextWeb/NextChat/issues/6756 exploit, issue-tracking
- https://github.com/ChatGPTNextWeb/NextChat/ product