Werkzeug safe_join() allows Windows special device names

TRUNG BÌNH 5.3CVE-2025-66221 · GHSA-hgf8-39gv-g3f2 · PYSEC-2026-2046 · Công bố 29/11/2025 · cập nhật 07/10/2026

Tóm tắt nhanh

CVE-2025-66221 là lỗ hổng mức TRUNG BÌNH (CVSS 5.3) ảnh hưởng werkzeug, werkzeug (palletsprojects).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.55%, cao hơn 45.9% các lỗ hổng khác.
Cách xử lý: cập nhật lên 3.1.4 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
werkzeug PyPI	`< 3.1.4`	`3.1.4`
werkzeug palletsprojects	`< 3.1.4`	`3.1.4`

Mô tả

Werkzeug's safe_join function allows path segments with Windows device names. On Windows, there are special device names such as CON, AUX, etc that are implicitly present and readable in every directory. send_from_directory uses safe_join to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.

Mô tả của NVD

Werkzeug is a comprehensive WSGI web application library. Prior to version 3.1.4, Werkzeug's safe_join function allows path segments with Windows device names. On Windows, there are special device names such as CON, AUX, etc that are implicitly present and readable in every directory. send_from_directory uses safe_join to safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely. This issue has been patched in version 3.1.4.