CVE-2026-7643CWE-346CWE-942

ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy

Medium · published May 2, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
12.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
EPSS
0.00225 · 12.4th percentile
Weaknesses
CWE-346 · Origin Validation Error; CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-05-02T14:45Z
EPSS history
Timeline
  • 02 MAY 14:45Z
    ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy
    cvelistv5