CVE-2026-43995: Flowiseai Flowise

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, multiple tool implementations directly import and invoke raw HTTP clients (node-fetch, axios) instead of using the secured wrapper. These tools include (1) OpenAPIToolkit/OpenAPIToolkit.ts, (2) WebScraperTool/WebScraperTool.ts, (3) MCP/core.ts, and (4) Arxiv/core.ts. This vulnerability is fixed in 3.1.0.

Affected products

• Flowiseai Flowise: before 3.1.0 (fixed in 3.1.0)

Published 2026-05-11. Last modified 2026-06-17.