Flowise Prompt Injection to RCE and SSRF via CSV/Airtable Agent Python Validator Bypass

flowise (npm), flowise-components (npm)

## Summary Flowise <= 3.1.2 CSV Agent and Airtable Agent nodes use a regex-based blocklist (`validatePythonCodeForDataFrame()`) to sanitize LLM-generated Python code before execution in Pyodide. The validator has multiple structural bypasses that allow an attacker to exfiltrate all loaded data to an external server, perform SSRF against internal…

First seen: 7 Oct 2026
Last update: 7 Oct 2026, 16:17 UTC
Fixed in: flowise 3.1.3
flowise-components 3.1.3
Identifiers: CVE-2026-73487
CVSS: 9.8
Source: GitHub advisory
On the menu as: npm packages
Python

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Flowise Prompt Injection to RCE and SSRF via CSV/Airtable Agent Python Validator Bypass
Severity: critical. Patch status: patched.
Affected: flowise (npm), flowise-components (npm)
Fixed in: flowise 3.1.3, flowise-components 3.1.3
Ids: CVE-2026-73487

## Summary Flowise <= 3.1.2 CSV Agent and Airtable Agent nodes use a regex-based blocklist (`validatePythonCodeForDataFrame()`) to sanitize LLM-generated Python code before execution in Pyodide. The validator has multiple structural bypasses that allow an attacker to exfiltrate all loaded data to an external server, perform SSRF against internal…

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `flowise`, `flowise-components`. For each hit, compare the installed version with the fix on the same major line: flowise 3.1.3, flowise-components 3.1.3. If it's lower, give the exact upgrade command for the package manager this repo uses.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-73487") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w7x8-q2gp-5cgg https://github.com/advisories/GHSA-w7x8-q2gp-5cgg https://nvd.nist.gov/vuln/detail/CVE-2026-73487 https://www.vulncheck.com/advisories/flowise-before-prompt-injection-rce-via-csv-agent
https://pwned.coffee/i/flowise-prompt-injection-to-rce-and-ssrf-via-csv-airtabl-cve-2026-73487

Sources

Totalone very hot coffee