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CVE-2026-27641

🚨 CRITICAL

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 re...

Published
Feb 25, 2026
Last Modified
Feb 27, 2026
Views
13
Bookmarks
0

Description

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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.

Affected Products (1)

jugmac00 - flask-reuploaded

Version: *

CVSS Scores

CVSS 3.1 9.8
9.8
CRITICAL
CVSS 2.0 9.8

References

github.com github.com github.com

Additional Information

Source
security-advisories@github.com
State
Analyzed

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