PT-2026-36626 · Nextchat · Nextchat

Yu.Bao · Published 2026-05-02 · Updated 2026-05-02 · CVE-2026-7644

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions ChatGPTNextWeb NextChat versions prior to 2.16.2

Description Improper authorization exists in the addMcpServer() function within the app/mcp/actions.ts file. This flaw allows for remote exploitation, enabling an attacker to bypass authorization controls.

Recommendations Update to a version newer than 2.16.1. As a temporary workaround, restrict access to the addMcpServer() function until a patch is applied.

Exploit

Fix

Incorrect Privilege Assignment

Improper Authorization

Weakness Enumeration

CWE-266

CWE-285

Related Identifiers

CVE-2026-7644

Affected Products

Nextchat

References · 7

• 🔥 https://github.com/ChatGPTNextWeb/NextChat/issues/6757 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7644 · Security Note
• https://twitter.com/VulmonFeeds/status/2050627642114572719 · Twitter Post
• https://vuldb.com/submit/806851 · Note
• https://github.com/ChatGPTNextWeb/NextChat · Note
• https://vuldb.com/vuln/360756/cti · Note
• https://vuldb.com/vuln/360756 · Note