CVE-2026-73486

Description

Flowise before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter that allows authenticated attackers to execute arbitrary Python code. The validator uses a static regex blocklist that can be bypassed through obfuscation techniques, enabling attackers to execute code in the unsandboxed pyodide environment with full system access.

References

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v
• https://www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v