Is this vulnerability remotely exploitable over the internet?

Not directly. Exploitation relies on the victim running the MCP server in a non-default, network-exposed configuration and then visiting a malicious website on the same machine. The attacker uses the victim's browser as a bridge to the local MCP server.

What level of access does an attacker need?

The attacker does not need direct access to the MCP server or the filesystem. They only need to get the developer to open a malicious or compromised web page in a browser while the MCP server is running in the vulnerable configuration.

What is the safest general fix pattern?

Ensure that any local service with privileged capabilities enforces authentication and strict origin controls before accepting commands. Keep the MCP server on safe default bindings, and when exposure is necessary, add explicit auth layers and carefully curated CORS rules.

Severity:

HIGH RISK

(7.5)

Missing Authentication & Insecure CORS (CWE-306, CWE-942) in Nhost CLI MCP Server

CVE-2026-34200

Published:

Mar 31, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Missing Authentication / Insecure Cross-Origin Protection

CWE:

CWE-306;CWE-942

Impact:

Unauthorized Privileged Operations via Cross-Origin Requests

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication / Insecure Cross-Origin Protection

CWE:

CWE-306;CWE-942

Impact:

Unauthorized Privileged Operations via Cross-Origin Requests

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Missing Authentication & Insecure CORS (CWE-306, CWE-942) in Nhost CLI MCP Server

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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