Description
Flowise before 3.1.2 sets Access-Control-Allow-Origin to a hardcoded wildcard (*) on its text-to-speech (TTS) generation endpoint (packages/server/src/controllers/text-to-speech/index.ts), independent of the server's configured CORS policy. This bypasses the server's otherwise restrictive default CORS configuration (getCorsOptions()) and allows any webpage to make cross-origin requests that trigger TTS generation using stored credentials, enabling drive-by cross-origin credential abuse.
Severity (CVSS)
| Base score | 6.9 |
|---|---|
| Severity | Medium |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-346 — Origin Validation Error
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Flowise | Flowise | 0 to <3.1.2; 3.1.2 |
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg (vendor-advisory)
- https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint (third-party-advisory)
Generated from the official CVE List on 01 Jul 2026 07:05 UTC.