CVE-2026-18482 (GCVE-0-2026-18482)

Vulnerability from cvelistv5 – Published: 2026-08-20 12:36 – Updated: 2026-08-20 19:16
VLAI
Title
CVE-2026-18482
Summary
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.
Severity
No CVSS data available.
Impacted products
Vendor Product Version CPE status
Klarso GmbH neo-mjs Affected: 0 , < 88c77fc4 (custom)
guessed Create a notification for this product.
Show details on NVD website

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          "vendor": "Klarso GmbH",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "custom"
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          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T19:16:46.108Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://github.com/neomjs/neo/commit/5acc564ea1b278bca5fab1f8f397a6ba9b849d75"
        },
        {
          "url": "https://github.com/neomjs/neo/commit/88c77fc4"
        },
        {
          "url": "https://novice-22.com/posts/neo-mjs/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CVE-2026-18482",
      "x_generator": {
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        "env": "prod",
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  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-18482",
    "datePublished": "2026-08-20T12:36:40.567Z",
    "dateReserved": "2026-07-31T12:46:16.513Z",
    "dateUpdated": "2026-08-20T19:16:46.108Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-08-24",
      "epss": "0.00753",
      "percentile": "0.52271"
    },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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