CVE-2026-73603CWE-862broken-access-control

CVE-2026-73603

Medium · published August 13, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
24.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00329 · 24.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-08-13T16:17Z
Affected products (1)
ProductVersionsFixed in
flowiseai/flowise< 3.1.43.1.4
References (3)
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7 · [email protected]https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speech · [email protected]https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 13 AUG 11:28Z
    Flowise before 3.1.4 Credential Abuse via Text-to-Speech
    cvelistv5