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.

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…

EPSS: 0.000 (5.1th percentile) — read the EPSS interpretation.

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.

Affected products

Chatgptnextweb Nextchat — versions 2.16.0, 2.16.1

Weakness classification (CWE)

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)
cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (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.