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CVE-2026-41269

CVE-2026-41269 · Flowise: File Upload Validation Bypass in createAttachment

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.1 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • flowise

    Versions
    • < 3.1.0: Affected

    No fix published

  • flowise npm

    Affected ranges
    • SEMVER: < 3.1.0

    Update to 3.1.0

Original sources

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