CVE-2026-91938

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

Flowise before 3.1.4 fails to scope enterprise organization and workspace membership APIs to the caller's tenant, allowing authenticated users to supply arbitrary organization IDs. An attacker can add themselves as organization owners, create workspaces, and gain administrative access to victim organizations.

Flowise versions before 3.1.4 contain cross-tenant authorization gaps in Enterprise endpoints that fail to verify resource ownership before operations. An attacker with Enterprise access can delete arbitrary workspaces, invite themselves into other organizations, modify cross-org roles, and abuse stored SSO secrets.

An issue in Flowise 3.1.2 allows a remote attacker to execute arbitrary code via the /api/v1/prediction/<flowId> endpoint.

Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox that allows authenticated users to execute arbitrary code by exploiting moment locale validation bypass.

Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection.

A vulnerability in Flowise (up to 3.1.4) in the OpenAI Assistants integration allows authenticated attackers to access credentials belonging to other workspaces by supplying an arbitrary credential UUID without workspace ownership verification.

Flowise prior to 3.1.3 contains a vulnerability in the POST /api/v1/oauth2-credential/refresh/:credentialId endpoint, which is in WHITELIST_URLS and requires no authentication. An attacker with a credential ID can refresh the OAuth token and gain access to the victim's connected service, as well as exhaust refresh-token quota.

Flowise before version 3.1.3 contains a prompt injection vulnerability in the CSV Agent node, allowing a malicious Python script to bypass the blocklist validator and execute in an unsandboxed Pyodide environment. An attacker can leverage this to execute arbitrary code in the context of the service account.

Flowise prior to 3.1.3 contains a vulnerability in the Python code validator that can be bypassed with Unicode homoglyphs, allowing arbitrary Python execution inside Pyodide and full OS command execution on the Flowise host.