Vulnerability · Published Aug 4, 2026 · Assigned by GitHub_M
CVE-2026-69255Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified
Critical 9.2
In plain English
A critical-severity code injection in Flowise from FlowiseAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | flowise | 3.1.3 | GHSA-vmv7-4m6c-3cg5 |
| npm | flowise-components | 3.1.3 | GHSA-vmv7-4m6c-3cg5 |
Affected products (as reported)
Weakness: CWE-94 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5 x_refsource_CONFIRM
- https://github.com/FlowiseAI/Flowise/pull/6499 x_refsource_MISC
- https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c x_refsource_MISC
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3 x_refsource_MISC