Description
Werkzeug is a comprehensive WSGI web application library. Versions 3.1.5 and below, the safe_join function allows Windows device names as filenames if preceded by other path segments. This was previously reported as GHSA-hgf8-39gv-g3f2, but the added filtering failed to account for the fact that safe_join accepts paths with multiple segments, such as example/NUL. The function 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 fixed in version 3.1.6.
INFO
Published Date :
2026-02-21T05:15:53.335Z
Last Modified :
2026-02-24T19:02:19.689Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-27199 vulnerability.
| Vendors | Products |
|---|---|
| Palletsprojects |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27199.
