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CVE-2026-91931

Flowise before 3.1.4 Remote Code Execution via Custom MCP npx

CVSS 3.1 8.5 HIGHCVSS 4.0 9.0 CRITICALCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-91931

Published

Flowise before 3.1.4 contains a remote code execution vulnerability in the Custom MCP node that allows authenticated attackers to execute arbitrary code by supplying npx package names in the mcpServerConfig parameter. Attackers can invoke npx with attacker-controlled npm packages to execute code on the Flowise server.

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CVE-2026-91931 · CVE overview and exploitation status

cve-program · CVE-2026-91931

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An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Nov 08:15 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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