What’s Vulnerable › Vulnerabilities

CVE-2026-18482: CVE-2026-18482

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-09-03
• Weakness: CWE-78

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.

Affected products

• Klarso GmbH neo-mjs: before 88c77fc4 — fixed in 88c77fc4

How to fix

Upgrade to a fixed version: Klarso GmbH neo-mjs 88c77fc4. Check the vendor advisory for mitigations.

References

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

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