CVE-2026-27641

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Source

https://cve.org/CVERecord?id=CVE-2026-27641

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27641.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-27641

Aliases

Published

2026-02-25T03:54:54Z

Modified

2026-10-21T02:56:35Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

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

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-1336"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27641.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "fixed":  "1.5.0"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StringRangeExpression"
                }
            ]
        },
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "fixed":  "1.5.0"
                        },
                        {
                            "fixed":  "1.5.0"
                        }
                    ],
                    "source":  "DESCRIPTION"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/jugmac00/flask-reuploaded

Affected ranges

Type

GIT

Repo

https://github.com/jugmac00/flask-reuploaded

Events

Introduced

Fixed

d64c6b2f71cb73734fc38baa0e3e156926361288

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "d64c6b2f71cb73734fc38baa0e3e156926361288"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

0.*

0.2.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27641.json"