Zip Slip Affecting psitransfer package, versions <2.3.1
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-JS-PSITRANSFER-14742509
- published1 Jan 2026
- disclosed30 Dec 2025
- creditDeniz Parlak
Introduced: 30 Dec 2025
CVE NOT AVAILABLE CWE-22 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade psitransfer to version 2.3.1 or higher.
Overview
psitransfer is a Simple open source self-hosted file sharing solution
Affected versions of this package are vulnerable to Zip Slip in the archive download functionality in endpoints.js. An attacker can write arbitrary files outside the intended extraction directory by uploading files with crafted filenames containing path traversal sequences and convincing a victim to download and extract the resulting archive.