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CVE

CVE-2026-27641

Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection
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CVE

CVE-2026-27641

Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27641.json, https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jr, https://nvd.nist.gov/vuln/detail/CVE-2026-27641, https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288, https://github.com/jugmac00/flask-reuploaded/pull/180

Severity

9.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.8
EPSS Probability
0.00226%
EPSS Percentile
0.45185%
Introduced Version
0
Fix Available
d64c6b2f71cb73734fc38baa0e3e156926361288

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