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CVE-2026-7644

📛 CVE Title

ChatGPTNextWeb NextChat actions.ts addMcpServer improper authorization

⬇ Download JSON ⚠ View as Threat

Description

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. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Overview

State
PUBLISHED
Assigner (CNA)
VulDB
CVSS severity
MEDIUM
CVSS score
CVSS 6.9 / 10 6.9 6.9 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Effective score
6.9 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-285, CWE-266
Reserved
2026-05-01
Published
2026-05-02 17:00 UTC
Last updated
2026-05-04 15:09 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/7xxx/CVE-2026-7644.json
Linked Threat
CVE-2026-7644 — CVE-2026-7644

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-02 15:16:14 UTC
NVD last modified
2026-05-05 19:15:06 UTC
NVD CVSS v3.1
CVSS 7.3 / 10 7.3 7.3 / 10 HIGH source: cna@vuldb.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Exploitability subscore
3.9 / 10
Impact subscore
3.4 / 10
EPSS score
0.0005 (probability of exploitation in next 30 days)
EPSS percentile
16.74% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 06:38 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-26798
Assigner
VulDB
Published
May 2, 2026, 3:00:13 PM
Updated
May 4, 2026, 1:09:05 PM
EUVD base score (CVSS 4.0)
6.9 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EUVD-reported EPSS
0.0500
Vendors
ChatGPTNextWeb
Products
NextChat (2.16.0)
NextChat (2.16.1)

ENISA description: 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. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

EUVD references (5)

Affected products (1)
VendorProductVersionsPlatforms
ChatGPTNextWeb NextChat 2.16.0 (affected), 2.16.1 (affected) —

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Web references (8)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-05-23 20:48 UTC
  • Android Security Bulletin—November 2025 - Android Open Source Project
    web:source.android.com

    Security patch levels of 2025-11-01 or later address all of these issues. To learn how to check a device's security patch level, see Check and update your Android version. Within 48 hours after the initial publication of this bulletin, we will release the corresponding source code patches to the Android Open Source Project (AOSP) repository.

    2026-05-23 20:48 UTC
  • About the security content of iOS 26.4 and iPadOS 26.4
    web:support.apple.com

    This document describes the security content of iOS 26.4 and iPadOS 26.4.

    2026-05-23 20:48 UTC
  • Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
    web:support.servicenow.com

    Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

    2026-05-23 20:48 UTC
  • CVE: Common Vulnerabilities and Exposures
    web:www.cve.org

    At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

    2026-05-23 20:48 UTC
  • 'Reboot Your PC'—Microsoft Changes 'Most Windows Devices' In June
    web:www.forbes.com

    Microsoft starts expiring critical Secure Boot certificates in just 2 weeks.

    2026-05-23 20:48 UTC
  • Microsoft Patch Tuesday - January 2026 - Lansweeper
    web:www.lansweeper.com

    Which vulnerabilities, issues, and other things did Microsoft update? Discover what's new using Lansweeper's Patch Tuesday January 2026 summary.

    2026-05-23 20:48 UTC
  • Microsoft KB Catalog: Updates, Issues, & Feedback - NinjaOne
    web:www.ninjaone.com

    Catalog of Microsoft KB updates with insights on performance & user sentiment. Find out what's working, what's not, & make informed decisions.

    2026-05-23 20:48 UTC
  • Critical Patch Updates, Critical Security Patch Updates ... - Oracle
    web:www.oracle.com

    Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.

    2026-05-23 20:48 UTC
  • Patch Tuesday May 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-05-23 20:48 UTC
  • Windows Kerberos RC4 deprecation: what will break in Active ... - 4sysops
    web:4sysops.com

    Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...

    2026-05-26 02:45 UTC
  • Security Updates - Red Hat Customer Portal
    web:access.redhat.com

    Learn about our open source products, services, and company. You are here

    2026-05-26 02:45 UTC
  • Oracle Critical Patch Update, April 2026 Security Update Review
    web:blog.qualys.com

    Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.

    2026-05-26 02:45 UTC
  • Security Advisory Bulletin 064 | Ubiquiti Community
    web:community.ui.com

    Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

    2026-05-26 02:45 UTC
  • Wireshark 4.6.6 Released With Fix for Dissector Crash via Malformed ...
    web:cybersecuritynews.com

    The Wireshark Foundation has released Wireshark 4.6.6, addressing a critical security vulnerability in the ROHC (Robust Header Compression) protocol dissector that could allow an attacker to crash the application by injecting a specially crafted, malformed packet.

    2026-05-26 02:45 UTC
  • Android Security Bulletins - Android Open Source Project
    web:source.android.com

    This Section contains the available Android Security Bulletins, which provide fixes for possible issues affecting Android devices.

    2026-05-26 02:45 UTC
  • January 24, 2026—Hotpatch KB5078167 (OS Builds 26200.7634 and 26100. ...
    web:support.microsoft.com

    This out-of-band Hotpatch update for Windows 11, version 25H2 and 24H2 (KB5078167), improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different ...

    2026-05-26 02:45 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-7644.json.

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7644",
                "options": [
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-04T13:08:36.355414Z",
                "version": "2.0.3"
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