Flowise - Custom MCP Environment Variable Denylist Bypass via Case Sensitivity
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flowise | Flowise | unaffected |
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No data.
| Vendor | Product | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flowiseai | Flowise |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 1.6% (1.556% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Flowise - Custom MCP Environment Variable Denylist Bypass via Case Sensitivity | |
| First Time appeared |
Flowiseai
Flowiseai flowise |
|
| Weaknesses | CWE-178 | |
| CPEs | cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Flowiseai
Flowiseai flowise |
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| References |
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| Metrics |
cvssV3_1
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