CVE-2026-18482

What it is

Neo.mjs contains a command injection vulnerability within the FileSystemService.mjs component of the ai/mcp/server/file-system MCP server, where the checkSyntax() and runPlaywrightTest() functions unsafely interpolate caller-controlled absolutePath values into shell commands, enabling arbitrary OS command execution when an AI agent is induced to invoke these tools. Commit 88c77fc fixes these vulnerabilities.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

3.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-20 13:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-03 17:42 UTC Last updatedMost recent change to the record

Details

Published

2026-08-20 13:16 UTC

Last modified

2026-09-03 17:42 UTC

Exploit probability

3.4% · EPSS, next 30 days

Weakness

CWE-78 · OS command injection

Record status

Awaiting Analysis

Attack profile CVSS 3.1 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High