CVE-2026-27641
Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1336 |
| Vendor | jugmac00 |
| Product | flask-reuploaded |
| Published | Feb 25, 2026 |
| Last Updated | Feb 25, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
jugmac00 / flask-reuploaded
< 1.5.0