CVE-2026-18482
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductKlarso Gmbh Neo-mjs
PublishedAug 20, 2026
First seenAug 20, 2026
Weakness typeCWE-78OS command injection
How to fix
Update
- Klarso GmbH neo-mjs88c77fc4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Klarso GmbH neo-mjs | v < 88c77fc4 | 88c77fc4 |
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