The release of PoC code for CVE-2026-40933 transforms a theoretical flaw in Flowise into an immediate operational threat for thousands of self-hosted deployments. While the SecurityWeek report correctly notes the command-injection vector via Anthropic MCP stdio adapters, it underplays the protocol-level design decision that makes every downstream tool inheriting MCP serialization logic equally exposed. Flowise’s 52,000 GitHub stars reflect its role as a de-facto standard for low-code LLM orchestration; once attackers script the JSON import payload, any organization running unpatched instances faces full host compromise with the privileges of the container process—frequently root. This mirrors earlier supply-chain patterns seen in the 2023 MOVEit and 2024 XZ Utils incidents, where a single trusted component became an entry point to broader ecosystems. Because Flowise commonly connects to production databases, cloud IAM roles, and internal APIs, the blast radius extends beyond the AI sandbox into core infrastructure. The decision by Flowise Cloud to disable stdio MCP highlights an implicit admission that the feature cannot be secured without breaking intended workflows. Enterprises that continue self-hosting without network segmentation or strict import controls are effectively running unaudited remote-execution surfaces at the heart of their AI development pipelines. Within months, automated scanning for vulnerable chatflow exports will likely appear in commodity attacker toolkits, accelerating the timeline from disclosure to mass exploitation.