CVE-2026-69263 Details
Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the mitigation for CVE-2025-8943 blocked -y and --yes flags on npx, but packages/components/nodes/tools/MCP/core.ts denied only PATH, LD_LIBRARY_PATH, DYLD_LIBRARY_PATH, and NODE_OPTIONS by exact environment-variable name. Because npm reads configuration from npm_config_* variables, setting npm_config_yes=true reproduced --yes behavior without using a blocked flag, causing npx to auto-install and execute the named package when a Custom MCP server launched. This issue is fixed in version 3.1.3.
A remote code execution vulnerability has been identified in Flowise, a user interface for building customized large language model flows. This issue affects versions through 3.1.2. The vulnerability arises from a patch intended to block certain flags on 'npx' commands, which was bypassed by manipulating 'npm_config_yes' environment variable. This allowed 'npx' to auto-install and execute packages on servers running Flowise's Custom MCP, taking advantage of the lack of authentication in default deployments.
Users can update to Flowise version 3.1.3, where this vulnerability has been addressed. The update changes the way environment variables are handled, replacing a denylist with an allowlist of permitted variables for Custom MCP.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw | CISA-ADP | ExploitVendor Advisory |
| https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351 | [email protected] | Patch |
| https://github.com/FlowiseAI/Flowise/pull/6471 | [email protected] | Issue TrackingPatch |
| https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] | [email protected] | PatchRelease Notes |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-184 | Incomplete List of Disallowed Inputs | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| flowiseai flowise | < 3.1.3 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | Initial Analysis | [email protected] |
| Aug 4, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |