CVE-2026-41269

HighCVSS 8.8/10Last modified Oct 26, 2026

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the Chatflow configuration file upload settings can be modified to allow the application/javascript MIME type. This lets an attacker upload .js files even though the frontend doesn’t normally allow JavaScript uploads. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE). This vulnerability is fixed in 3.1.0.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-434

Affected software

VendorProductVersions
FlowiseAIFlowise< 3.1.0

References

Timeline

Published
Apr 23, 2026
Last modified
Oct 26, 2026
NVD status
Modified

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CVE-2026-41269: High severity, CVSS 8.8 | Vulnix