CVE-2026-27641Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection
Updated under an hour ago ()
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It affects jugmac00 flask-reuploaded and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-1336
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Feb 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
jugmac00 flask-reuploaded jugmac00:flask_reuploaded (from the name) | before 1.5.0 | CNA record |
jugmac00 flask-reuploaded jugmac00:flask-reuploaded | before 1.5.0 | NVD |
References
- https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jrx-refsource-confirm, exploit, vendor-advisory
- https://github.com/jugmac00/flask-reuploaded/pull/180x-refsource-misc, issue-tracking, patch
- https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.