| Component | Flowise |
| Severity | high (CVSS 8.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-08-13 |
| Last modified | 2026-09-03 |
| Affected versions | flowise < 3.1.3 |
| Fixed in | 3.1.3 |
| Weakness | CWE-184 |
| CISA KEV | not listed |
NVD description
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.
What to do
- Upgrade Flowise to
3.1.3or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-73484
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x58f-9m57-qc4m
- https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-pandas-methods
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