Arbitrary File Upload Affecting flowise package, versions <3.1.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-FLOWISE-16119425
- published22 Apr 2026
- disclosed16 Apr 2026
- creditReuben Seah
Introduced: 16 Apr 2026
NewCVE-2026-41269 (opens in a new tab)How to fix?
Upgrade flowise to version 3.1.0 or higher.
Overview
flowise is a Flowiseai Server
Affected versions of this package are vulnerable to Arbitrary File Upload in the createAttachment in Chatflow. An attacker can upload and persistently store malicious JavaScript files on the server by bypassing MIME type validation, which may lead to the execution of arbitrary code if the uploaded file is triggered.