What is CVE-2026-73603?
Flowise versions before 3.1.4 fail to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS credentials. This enables unauthenticated attackers to generate unlimited text-to-speech audio using stored API keys like OpenAI or ElevenLabs. Immediate update to version 3.1.4 or later is recommended.
Azərbaycanca: Flowise platformasının 3.1.4 versiyasından əvvəlki versiyalarında autentifikasiya olunmamış text-to-speech endpointində chatflow görünürlük yoxlanışı düzgün aparılmır. Bu boşluq hücumçulara şəxsi chatflow TTS etimadnamələrindən sui-istifadə edərək limitsiz səs faylı yaratmağa imkan verir. Dərhal Flowise-i 3.1.4 və ya daha yuxarı versiyaya yeniləmək tövsiyə olunur.
Related CVEs
link basis: same weakness class CWE-306; shared vendor: Flowise
FAQ2
Which platform is affected by CVE-2026-73603 and what is its root cause?
The vulnerability affects Flowise versions before 3.1.4. The root cause is the failure to validate chatflow visibility in the unauthenticated text-to-speech endpoint.
What can an attacker achieve by exploiting CVE-2026-73603 and how to protect against it?
An attacker can abuse private chatflow TTS credentials to generate unlimited text-to-speech audio using stored API keys like OpenAI or ElevenLabs. To protect, immediate update to version 3.1.4 or later is recommended.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.