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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Flowiseai | Flowise | < 3.1.4 |
Related Weaknesses (CWE)
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7ExploitMitigationVendor Advisory
- https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-toThird Party Advisory
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-73603?
CVE-2026-73603 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 g...
How severe is CVE-2026-73603?
CVE-2026-73603 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73603?
Check the references section above for vendor advisories and patch information. Affected products include: Flowiseai Flowise.