Vulnerability in Chatgptnextweb Nextchat
CVE-2026-7643
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Chatgptnextweb Nextchat — versions 2.16.0, 2.16.1
Weakness classification (CWE)
References
- vuldb.com/vuln/360755 (vdb-entry)
- vuldb.com/vuln/360755/cti (signature, permissions-required)
- vuldb.com/submit/806833 (third-party-advisory)
- github.com/ChatGPTNextWeb/NextChat/issues/6756 (issue-tracking, exploit)
- github.com/ChatGPTNextWeb/NextChat/ (product)
Frequently asked questions
- What is CVE-2026-7643?
- CVE-2026-7643 is a medium-severity vulnerability in Chatgptnextweb Nextchat, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2026-05-02.
- How severe is CVE-2026-7643?
- Medium severity. CVSS v3 base score is 4.3 out of 10.