An AI agent workflow is a chain of automated steps where an AI model — ChatGPT, Claude, or an open-source equivalent — is given access to your tools, APIs, and data so it can complete multi-step tasks on its own. Think of it as wiring an AI into your business systems and letting it act, rather than just chat with it. Langflow, the open-source platform at the centre of this week’s CISA Known Exploited Vulnerabilities update, is one of the most popular tools for building these workflows.

Why it matters this week. CISA added Langflow’s CVE-2025-34291 to its Known Exploited Vulnerabilities catalog on 21 May 2026, after researchers tied the bug to MuddyWater, an Iranian state-sponsored group using it to break into target networks. The flaw lets an attacker who tricks a Langflow user into visiting a malicious web page take over their entire workspace — including every API key, OAuth token, and database credential that workspace has wired in. For a small business that has experimented with an AI workflow tool, that single vulnerability can mean attackers walking off with the keys to your email, CRM, and finance system in one motion.

What this means for your business. If anyone at your firm — a developer, a consultant, or an AI-curious manager — has set up Langflow, n8n, or any “agent workflow” tool, treat it like any other production system. It needs to be patched, isolated from sensitive credentials, kept off the open internet where possible, and put behind proper authentication. The convenience of plugging an AI into ten tools at once disappears quickly when one of them gets breached. If you are unsure what AI tooling is running inside your business, an honest cybersecurity audit is a sensible first step.