Unknown · Flask-Reuploaded · CVE-2026-27641
**Name of the Vulnerable Software and Affected Versions**
Flask-Reuploaded versions prior to 1.5.0
**Description**
Flask-Reuploaded, a file upload package for Flask, contains a path traversal and extension bypass flaw. This allows remote attackers to perform arbitrary file writes and achieve remote code execution (RCE) through Server-Side Template Injection (SSTI). Server-Side Template Injection (SSTI) is a web security vulnerability that allows an attacker to inject arbitrary code into a web application by exploiting template engines. The `name` parameter is a potential entry point for this issue.
**Recommendations**
Upgrade to version 1.5.0 or later to resolve this issue.
Do not pass user input to the `name` parameter.
Use auto-generated filenames only.
Implement strict input validation if the `name` parameter must be used.