Security Advisory
CVE-2026-73603
5.3
MEDIUM
Vulnerability Description
Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS credentials. Unauthenticated attackers can generate unlimited text-to-speech audio using stored OpenAI or ElevenLabs API keys by providing a valid chatflow UUID, incurring costs on the chatflow owner's account.
Published Date
August 13, 2026
Official Source
NIST NVD Advisory