{"id":"CVE-2026-69255","aliases":["GHSA-vmv7-4m6c-3cg5"],"url":"https://o3.security/vulnerability/CVE-2026-69255","summary":"Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified","details":"Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the CSVAgent in packages/components/nodes/agents/CSVAgent/CSVAgent.ts extracted attacker-controlled CSV data with file.split(',').pop() and interpolated it directly into executable Python as base64_string = \"${base64String}\" before calling Pyodide. The validatePythonCodeForDataFrame() denylist only checked later LLM-generated code and did not validate this initial code block. An authenticated attacker could inject a closing quote followed by Python code, use Pyodide's js bridge to load Node.js child_process, and execute arbitrary operating system commands as root in the Flowise container. This issue is fixed in version 3.1.3.","published":"2026-08-04T15:39:39.166Z","modified":"2026-09-16T03:47:21.232772178Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"flowise","fixedVersion":"3.1.3"},{"ecosystem":"npm","name":"flowise-components","fixedVersion":"3.1.3"}],"fix":{"url":"https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c","label":"FlowiseAI/Flowise@f4e2794"},"references":[{"type":"WEB","url":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69255.json"},{"type":"ADVISORY","url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69255"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/pull/6499"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T03:47:21.232772178Z"}}