MEDIUM 6.3 NVD
CVE-2026-73603
Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS cred
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.
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7
- https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speech
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-08-13 via NVD.
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