Insufficient Session Expiration Affecting lfx package, versions [,0.2.1)
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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Test your applications- Snyk IDSNYK-PYTHON-LFX-17400336
- published22 Jun 2026
- disclosed19 Jun 2026
- creditIan Mckay
Introduced: 19 Jun 2026
NewCVE-2026-55423 (opens in a new tab)How to fix?
Upgrade lfx to version 0.2.1 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 Insufficient Session Expiration in the logout. An attacker can maintain unauthorized access to a user's session by exploiting improper clearing of authentication cookies and tokens after logout. This may allow continued access to sensitive information if a user believes they have logged out but their session remains active.