{"id":"CVE-2026-18482","state":"PUBLISHED","title":"CVE-2026-18482","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.","publishedAt":"2026-08-20T12:36:40.567Z","updatedAt":"2026-08-27T17:41:12.025Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"certcc","products":["Klarso GmbH neo-mjs"],"affected":[{"vendor":"Klarso GmbH","product":"neo-mjs","versions":[{"version":"0","status":"affected","lessThan":"88c77fc4","versionType":"custom"}]}],"references":["https://github.com/neomjs/neo/commit/5acc564ea1b278bca5fab1f8f397a6ba9b849d75","https://github.com/neomjs/neo/commit/88c77fc4","https://novice-22.com/posts/neo-mjs/"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18482.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18482","state":"PUBLISHED","datePublished":"2026-08-20T12:36:40.567Z","dateUpdated":"2026-08-27T17:41:12.025Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-07-31T12:46:16.513Z"},"containers":{"cna":{"title":"CVE-2026-18482","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Klarso GmbH","product":"neo-mjs","versions":[{"version":"0","status":"affected","lessThan":"88c77fc4","versionType":"custom"}]}],"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/"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2026-08-20T19:16:46.108Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"VINCE 3.0.44","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-18482"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://novice-22.com/posts/neo-mjs/","tags":["exploit"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-27T17:41:03.974867Z","id":"CVE-2026-18482","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","type":"CWE","lang":"en","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-27T17:41:12.025Z"}}]}}}