CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-27641
Critical (9.8) in jugmac00 flask-reuploaded. EPSS 1.3% chance of exploitation in the next 30 days. Fixed in flask-reuploaded 1.5.0.
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.
Severity
- EPSS
- 1.3% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-1336
- Published
- Modified
- Record from
- the NVD, synced
Affected
- jugmac00:flask-reuploaded
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-65mp-fq8v-56jr | PyPI | flask-reuploaded | <1.5.0 | 1.5.0 |
| PYSEC-2026-341 | PyPI | flask-reuploaded | <1.5.0 | 1.5.0 |