---
title: "CVE-2026-69255: Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified"
url: https://erroneo.us/security/cve/CVE-2026-69255/
description: "CVE-2026-69255 (flowise (npm)): Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the CSVAgent in…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-04
date_modified: 2026-08-04
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-69255"
kev: false
cvss: 9.2
epss: 0.00602
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-69255: Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes flowise (npm) <= 3.1.2, fixed in 3.1.3 ; flowise-components (npm) <= 3.1.2, fixed in 3.1.3 . Check your lockfile, including transitive dependencies.

## What it is

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 base64string = "${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 childprocess, and execute arbitrary operating system commands as root in the Flowise container. This issue is fixed in version 3.1.3.

## Affected packages

- npm `flowise` <= 3.1.2 → fixed: 3.1.3
- npm `flowise-components` <= 3.1.2 → fixed: 3.1.3

## Affected products (CVE record)

- FlowiseAI Flowise: < 3.1.3

## Severity

- GitHub_M CVSS 4.0: 9.2 `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`
- GitHub CVSS 4.0: 9.2 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.60% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [GitHub Advisory GHSA-vmv7-4m6c-3cg5](https://github.com/advisories/GHSA-vmv7-4m6c-3cg5)
- [CVE.org record CVE-2026-69255](https://www.cve.org/CVERecord?id=CVE-2026-69255)
- [NVD entry CVE-2026-69255](https://nvd.nist.gov/vuln/detail/CVE-2026-69255)
- [github.com](https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-vmv7-4m6c-3cg5)
- [github.com](https://github.com/FlowiseAI/Flowise/pull/6499)
- [github.com](https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c)
- [github.com](https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.3)

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Source page: https://erroneo.us/security/cve/CVE-2026-69255/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt