Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified (CVE-2026-69255) | HOL Guard CVE

Critical · CVSS 9.2CVE-2026-69255GHSA-VMV7-4M6C-3CG5

Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified

Answer in brief

CVE-2026-69255 records a Critical severity (CVSS 9.2) vulnerability in Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified. The current sources do not mark it as known exploited. The current feed maps FlowiseAI/Flowise (generic), flowise (npm), flowise-components (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 4, 2026Updated Sep 8, 2026Source checked Sep 18, 2026First seen by HOL Aug 4, 2026Material review Sep 8, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.2
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FlowiseAI/Flowise (generic), flowise (npm), flowise-components (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
FlowiseAI/Flowisegeneric	< 3.1.3	Not reported
flowisenpm	<=3.1.2	3.1.3
flowise-componentsnpm	<=3.1.2	3.1.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for FlowiseAI/Flowise, flowise, flowise-components.
Review the reported fix. Update flowise to 3.1.3; flowise-components to 3.1.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.