CVE-2026-73603

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7	Exploit Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speech	Third Party Advisory
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-13 12:17

Updated : 2026-09-04 19:38

NVD link : CVE-2026-73603

Mitre link : CVE-2026-73603

CVE.ORG link : CVE-2026-73603

JSON object : View

Products Affected

flowiseai

flowise

CWE

CWE-862

Missing Authorization

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