{"id":"CVE-2026-105740","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105740","generatedAt":"2026-10-28T03:41:48.563Z","title":"Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the \"Stdio\" transport.","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the \"Stdio\" transport. The user-supplied command field is passed directly to bash -c \"exec {command}\" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.","published":"2026-10-05T21:16:36.000Z","lastModified":"2026-10-06T19:17:41.000Z","status":"Undergoing Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":[],"epss":{"score":0.01049,"percentile":0.64083,"date":"2026-10-27","history":[{"date":"2026-10-06","score":0.00589,"percentile":0.46381}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-05T21:16:36.000Z","detail":{"score":"9.9","severity":"CRITICAL","publishedAt":"2026-10-05T21:16:35.567Z"},"summary":"New CVE, critical severity (CVSS 9.9)."}],"references":[{"url":"https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0","source":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/pull/12290","source":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2","source":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45","source":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105740","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}