Server-Side Request Forgery (SSRF) in Flowise - CVE-2026-41270
Published: April 20, 2026
Vulnerability identifier: #VU126608
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-41270
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FlowiseAI
Affected software:
Flowise
Flowise
Detailed vulnerability description
The vulnerability allows a remote user to access internal network resources and disclose sensitive information.
The vulnerability exists due to improper access control in the Custom Function sandbox when executing user-supplied JavaScript code that imports built-in Node.js http, https, or net modules. A remote user can submit a specially crafted custom function to access internal network resources and disclose sensitive information.
Only deployments with HTTP_DENY_LIST configured are affected by this protection bypass, and no user interaction is required.
How to mitigate CVE-2026-41270
Install security update from vendor's website.