Medium severity5.3NVD Advisory· Published Aug 13, 2026· Updated Oct 23, 2026
CVE-2026-73603
CVE-2026-73603
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
2- github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7nvdExploitMitigationVendor Advisory
- www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speechnvdThird Party Advisory
News mentions
1- Flowise: Ten RCE and Data Exposure Vulnerabilities Disclosed TogetherVypr Intelligence · Aug 13, 2026