by Kastro
Paper/Archive/CVE-2026-27641

CVE-2026-27641

jugmac00 flask-reuploaded — Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection

EPSS 1%CVSS 9.8
critical.is priorityof 100
44
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 71.2.712 × 2014.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
flask-reuploaded< 1.5.0–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jrrefgithub.com/jugmac00/flask-reuploaded/pull/180refgithub.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288