CVE-2026-58057 EXPLOIT
5.0
MEDIUM · CVSS 3.1 · EPSS 1.6% (pctl 74)
Patch early
A public exploit exists.
Description
Flowise before 3.1.3 validates Custom MCP stdio environment variables against a denylist using a case-sensitive comparison, so on Windows, where environment names are case-insensitive, supplying 'node_options' bypasses the NODE_OPTIONS denylist entry. An authenticated user who can configure a Custom MCP node can thereby inject NODE_OPTIONS --require and execute arbitrary code in the Flowise server context.
Scoring
| CVSS | 5.0 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
| EPSS | 1.56% — more likely to be exploited than 74% of all CVEs |
| Weakness | CWE-178 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2026-06-28 |
| Last modified | 2026-07-06 |
Affected (1)
| Vendor | Product |
|---|---|
| flowiseai | flowise |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Flowise 3.1.3 - arbitrary code execution | 2026-07-07 |
References
→ the Explorer · watch your stack · NVD