Flowise: CVE-2025-8943 Patch Bypass: npm_config_yes bypasses MCP environment variable blocklist (Unauthenticated RCE)
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| FlowiseAI | Flowise | before 3.1.3 | 3.1.3 | Patch available | CNA |
| — | flowise (npm) | before 3.1.3 | 3.1.3 | Patch available | GHSA-xc48-889x-5qmw |
| — | flowise-components (npm) | before 3.1.3 | 3.1.3 | Patch available | GHSA-xc48-889x-5qmw |
- Flowise VendorFlowiseAI Affected before 3.1.3 Fixed in 3.1.3 Patch available CNA
- flowise (npm) Vendor— Affected before 3.1.3 Fixed in 3.1.3 Patch available GHSA-xc48-889x-5qmw
- flowise-components (npm) Vendor— Affected before 3.1.3 Fixed in 3.1.3 Patch available GHSA-xc48-889x-5qmw
Remediation
- Fix · CNA Flowise (FlowiseAI) Fixed in 3.1.3
- Fix · GHSA-xc48-889x-5qmw flowise (npm) Fixed in 3.1.3 Advisory →
- Fix · GHSA-xc48-889x-5qmw flowise-components (npm) Fixed in 3.1.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-69263
- 2026-10-03 Alias added: GHSA-xc48-889x-5qmw
- 2026-10-06 EPSS moved to the 50th–90th percentile
References
Patch 3
More FlowiseAI Flowise vulnerabilities
- TI-2025-37059 Flowise has Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
- TI-2025-36193 Flowise Cloud and Local Deployments have Unauthenticated Password Reset Token Disclosure that Leads to Account Takeover CVSS 3.1CRITICAL 9.8
- TI-2025-08190 Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers CVSS 3.1CRITICAL 9.8
- TI-2026-51595 Flowise before 3.1.3 Sandbox Escape via Puppeteer CVSS 4.0CRITICAL 9.4
- TI-2026-49250 Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability CVSS 4.0CRITICAL 9.5
- TI-2025-43459 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API CVSS 4.0CRITICAL 10.0
Sources
- CVE-2026-69263 · CVE Program
- CVE-2026-69263 · NVD
- FIRST EPSS
- GHSA-xc48-889x-5qmw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences