CVE-2026-40933: Flowise: Authenticated RCE Via MCP Adapters
Due to unsafe serialization of stdio commands in the MCP adapter, an authenticated attacker can add an MCP stdio server with an arbitrary command, achieving command execution.
References
- github.com/FlowiseAI/Flowise
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-c9gw-hvqq-f33r
- github.com/advisories/GHSA-c9gw-hvqq-f33r
- nvd.nist.gov/vuln/detail/CVE-2026-40933
- www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem
- www.ox.security/blog/the-mother-of-all-ai-supply-chains-critical-systemic-vulnerability-at-the-core-of-the-mcp
Code Behaviors & Features
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