CVE-2026-73484: Flowiseai Flowise

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Flowise before 3.1.3 contains a sandbox escape vulnerability in pythonCodeValidator.ts that fails to block native Pandas DataFrame methods like to_csv, to_json, pipe, and query. Authenticated attackers can exploit this to exfiltrate uploaded CSV data or write arbitrary files to the server filesystem.

Affected products

• Flowiseai Flowise: before 3.1.3 (fixed in 3.1.3)

Published 2026-08-13. Last modified 2026-09-03.