VULNERABILITY INTELLIGENCE

CVE-2026-56277

CVSS score6.5 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-06-30
Last modified2026-07-06
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-346

Primary references