CVE-2026-18482 PUBLISHED

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.

• https://github.com/neomjs/neo/commit/5acc564ea1b278bca5fab1f8f397a6ba9b849d75
• https://novice-22.com/posts/cve-2026-18482-neo.mjs/
• https://github.com/neomjs/neo/commit/88c77fc4

• CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')