Vulnerability Details CVE-2026-27641
Flask-Reuploaded provides file uploads for Flask. A critical path traversal and extension bypass vulnerability in versions prior to 1.5.0 allows remote attackers to achieve arbitrary file write and remote code execution through Server-Side Template Injection (SSTI). Flask-Reuploaded has been patched in version 1.5.0. Some workarounds are available. Do not pass user input to the `name` parameter, use auto-generated filenames only, and implement strict input validation if `name` must be used.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 32.3%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2026-27641
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cpe:2.3:a:jugmac00:flask-reuploaded:*