CVEvulnerability

CVE-2026-27641

9.8 CRITICAL Published 2026-02-25 Modified 2026-06-17 Official page ↗

Status: Analyzed
Published: 2026-02-25
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-1336, CWE-22

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.

Affected configurations

• jugmac00 flask-reuploaded (< 1.5.0)

Weakness · CWE (2)

CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine weakness
CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References

https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288 Patch
https://github.com/jugmac00/flask-reuploaded/pull/180 Issue Tracking, Patch
https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jr Exploit, Vendor Advisory

CVE-2026-27641

Description

Affected configurations

Related

Weakness · CWE (2)

References