CVE-2026-69263: CWE-184: Incomplete List of Disallowed Inputs in FlowiseAI Flowise
Flowise versions prior to 3.1.3 have an incomplete mitigation for a security issue where certain environment variables were not blocked, allowing unintended automatic package installation via npx when launching a Custom MCP server. This vulnerability is identified as CVE-2026-69263 and is fixed in version 3.1.3.
AI Analysis
Technical Summary
Flowise, a drag-and-drop interface for building customized large language model flows, had a vulnerability (CVE-2026-69263) due to incomplete filtering of environment variables controlling npx behavior. While prior mitigation blocked the -y and --yes flags on npx, it did not block npm_config_yes environment variables, which can trigger the same automatic package installation behavior. This allowed an attacker to cause npx to auto-install and execute arbitrary packages when a Custom MCP server launched. The issue is resolved in Flowise version 3.1.3.
Potential Impact
An attacker with the ability to set environment variables could bypass existing mitigations and cause npx to automatically install and execute arbitrary packages, potentially leading to code execution in the context of the Flowise application. This elevates the risk of unauthorized code execution and compromise of the affected system.
Mitigation Recommendations
Upgrade Flowise to version 3.1.3 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the fix is included in version 3.1.3.
CVE-2026-69263: CWE-184: Incomplete List of Disallowed Inputs in FlowiseAI Flowise
Description
Flowise versions prior to 3.1.3 have an incomplete mitigation for a security issue where certain environment variables were not blocked, allowing unintended automatic package installation via npx when launching a Custom MCP server. This vulnerability is identified as CVE-2026-69263 and is fixed in version 3.1.3.
CVSS v4.0
Score 8.7high
Affected software
FlowiseAI
Flowise
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Flowise, a drag-and-drop interface for building customized large language model flows, had a vulnerability (CVE-2026-69263) due to incomplete filtering of environment variables controlling npx behavior. While prior mitigation blocked the -y and --yes flags on npx, it did not block npm_config_yes environment variables, which can trigger the same automatic package installation behavior. This allowed an attacker to cause npx to auto-install and execute arbitrary packages when a Custom MCP server launched. The issue is resolved in Flowise version 3.1.3.
Potential Impact
An attacker with the ability to set environment variables could bypass existing mitigations and cause npx to automatically install and execute arbitrary packages, potentially leading to code execution in the context of the Flowise application. This elevates the risk of unauthorized code execution and compromise of the affected system.
Mitigation Recommendations
Upgrade Flowise to version 3.1.3 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the fix is included in version 3.1.3.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-03T19:54:19.853Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a721d52bf8831d53928c602
Added to database: 08/04/2026, 17:11:46 UTC
Last enriched: 08/11/2026, 18:18:32 UTC
Last updated: 09/18/2026, 02:30:21 UTC
Views: 53
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