CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, при специфични условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Flask-Reuploaded provides file uploads for Flask. From 1.5.0 until 1.6.0, UploadSet.save(storage, name=...) in src/flask_uploads/flask_uploads.py applies lowercase_ext to the default upload path but uses the case-preserving extension helper for a caller-supplied name before extension_allowed evaluates an AllExcept denylist. An attacker who controls the name override can use a mixed-case dangerous extension to bypass a lowercase denylist and store the file in the served upload directory. Exploitation requires a denylist configuration, a user-influenced name override, and a deployment that resolves or executes extensions case-insensitively; pure allowlists remain protected and path containment is not bypassed. On an execution-capable upload directory, the stored file can execute with the web server's privileges and affect confidentiality, integrity, and availability. This issue is fixed in version 1.6.0.
Засегнати продукти
- jugmac00 flask-reuploaded: < 1.6.0
Вид слабост
История
- 14 септември 2026 Публикувано
Други уязвимости в jugmac00 flask-reuploaded
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-54567
- https://nvd.nist.gov/vuln/detail/CVE-2026-54567
- https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-937x-gpqr-72gg
- https://github.com/jugmac00/flask-reuploaded/pull/186
- https://github.com/jugmac00/flask-reuploaded/commit/5ded76092429c6eb8a4af941b14fbde40a38fff4