cvedb.io
CVE-2026-27641
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-02-25T04:16:04.620 · Last modified 2026-06-17T10:27:26.560

Summary

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

jugmac00 — flask-reuploaded

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.