Missing Authentication for Critical Function in Flowise - CVE-2026-41279
Published: April 20, 2026
Vulnerability identifier: #VU126595
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-41279
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FlowiseAI
Affected software:
Flowise
Flowise
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper access control in the POST /api/v1/text-to-speech/generate endpoint when handling unauthenticated text-to-speech generation requests with an attacker-supplied credentialId. A remote attacker can send a specially crafted request referencing stored credentials to cause a denial of service.
The issue is triggered when the request omits a chatflowId, causing the endpoint to use the credentialId supplied in the request body to decrypt stored credentials and invoke the configured provider.
How to mitigate CVE-2026-41279
Install security update from vendor's website.