UNIX Symbolic Link (Symlink) Following Affecting lfx package, versions [,0.4.2)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-LFX-17400345
- published22 Jun 2026
- disclosed19 Jun 2026
- creditOri Lahav
Introduced: 19 Jun 2026
NewCVE-2026-55447 (opens in a new tab)How to fix?
Upgrade lfx to version 0.4.2 or higher.
Overview
lfx is a lfx is a command-line tool for running Langflow workflows. It provides two main commands: serve and run.
Affected versions of this package are vulnerable to UNIX Symbolic Link (Symlink) Following via the BaseFileComponent._unpack_bundle function. An attacker can access arbitrary files and execute code by uploading a crafted tar archive containing symlinks that point to sensitive files, such as authentication secrets, which can then be leveraged to bypass authentication and execute arbitrary Python code.