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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-27641 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288 GitHub, Inc.
https://github.com/jugmac00/flask-reuploaded/pull/180 GitHub, Inc.
https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jr GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-27641
NVD Published Date:
02/24/2026
NVD Last Modified:
02/24/2026
Source:
GitHub, Inc.