Missing Authorization in Flowise - CVE-2026-70471
Published: July 30, 2026
Vulnerability identifier: #VU140083
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-70471
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper authorization in the /api/v1/node-custom-function custom function endpoint when injecting $vars into the code execution sandbox. A remote user can call the endpoint and access workspace variables, including runtime values resolved from server environment variables, to disclose sensitive information.
The issue bypasses the variables:view permission boundary, and runtime variables of type runtime are resolved from process.env.
Affected software
Flowise
How to mitigate CVE-2026-70471
Install security update from vendor's website.
Flowise - update to 3.1.3