GHSA-5fw2-mwhh-9947: Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials

April 17, 2026

The text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech.

References

github.com/FlowiseAI/Flowise
github.com/FlowiseAI/Flowise/security/advisories/GHSA-5fw2-mwhh-9947
github.com/advisories/GHSA-5fw2-mwhh-9947

Code Behaviors & Features

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