← Vulnerability feed

Vulnerability record · CVE-2026-27641 · published 25 February 2026

CVE-2026-27641: Jugmac00 flask-reuploaded path traversal vulnerability

JJugmac00 · Flask Reuploaded

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.

9.8 CVSS 3.1 Critical EPSS 1.2% · top 32.1% CWE-1336 · CWE-1336CWE-22 · Path traversal
9.8CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288 Patch
https://github.com/jugmac00/flask-reuploaded/pull/180 Issue TrackingPatch
https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jr ExploitVendor Advisory

Track CVE-2026-27641 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-75650Adobe Commerce template engine flaw allows unauthenticated remote code executionAdobe Commerce, Commerce B2B and Magento are affected by improper neutralization of special elements used in a template engine (CWE-1336), allowing a…KEVEPSS 3.9%analysed9.8CVE-2024-23692Rejetto HTTP File Server template injection leads to unauthenticated RCERejetto HTTP File Server through version 2.3m is vulnerable to template injection, allowing a remote unauthenticated attacker to execute arbitrary co…KEVEPSS 99%analysed10.0CVE-2024-4040CrushFTP server-side template injection enables unauthenticated sandbox escape and RCECrushFTP versions before 10.7.1 and 11.1.0 contain a server-side template injection flaw that lets unauthenticated remote attackers escape the VFS sa…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2026-27641), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.