Auth bypass in Chatgptnextweb Nextchat
CVE-2026-7644
A vulnerability has been found in ChatGPTNextWeb NextChat up to 2.16.1. Affected is the function addMcpServer of the file app/mcp/actions.ts. The manipulation leads to improper authorization. Remote exploitation of the attack is possible…
EPSS: 0.001 (18.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Chatgptnextweb Nextchat — versions 2.16.0, 2.16.1
Weakness classification (CWE)
References
- VDB-360756 | ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization (technical-description, vdb-entry)
- VDB-360756 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #806851 | ChatGPTNextWeb NextChat 2.16.1 Unauthenticated Remote Code Execution (third-party-advisory)
- cna@vuldb.com (issue-tracking, exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-7644?
- CVE-2026-7644 is a high-severity vulnerability in Chatgptnextweb Nextchat, classified under Incorrect Privilege Assignment. CVSS score: 7.3/10. Published 2026-05-02.
- How severe is CVE-2026-7644?
- High severity. CVSS v3 base score is 7.3 out of 10.