NiceGUI is a Python-based UI framework. Prior to 3.10.0, Since PurePosixPath only recognizes forward slashes (/) as path separators, an attacker can bypass this sanitization on Windows by using backslashes (\) in the upload filename. Applications that construct file paths using file.name (a pattern demonstrated in NiceGUI's bundled examples) are vulnerable to arbitrary file write on Windows. This vulnerability is fixed in 3.10.0.
References
Configurations
Configuration 1 (hide)
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History
15 Apr 2026, 19:08
| Type | Values Removed | Values Added |
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| First Time |
Microsoft
Zauberzeug Zauberzeug nicegui Microsoft windows |
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| CPE | cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* |
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| References | () https://github.com/zauberzeug/nicegui/commit/d38a702e3af2da5b0708f689be8d71413fc77056 - Patch | |
| References | () https://github.com/zauberzeug/nicegui/releases/tag/v3.10.0 - Release Notes | |
| References | () https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w8wv-vfpc-hw2w - Vendor Advisory |
08 Apr 2026, 21:16
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| New CVE |
Information
Published : 2026-04-08 21:16
Updated : 2026-04-15 19:08
NVD link : CVE-2026-39844
Mitre link : CVE-2026-39844
CVE.ORG link : CVE-2026-39844
JSON object : View
Products Affected
microsoft
- windows
zauberzeug
- nicegui
CWE
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
