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.
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History
Wed, 15 Apr 2026 19:15:00 +0000
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Microsoft
Microsoft windows |
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| CPEs | cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* |
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| Vendors & Products |
Microsoft
Microsoft windows |
Thu, 09 Apr 2026 17:15:00 +0000
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ssvc
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Thu, 09 Apr 2026 08:30:00 +0000
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Zauberzeug
Zauberzeug nicegui |
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| Vendors & Products |
Zauberzeug
Zauberzeug nicegui |
Wed, 08 Apr 2026 20:30:00 +0000
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| Description | 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. | |
| Title | NiceGUI has a Path Traversal in NiceGUI Upload Filename on Windows via Backslash Bypass of PurePosixPath Sanitization | |
| Weaknesses | CWE-22 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-04-08T20:13:31.935Z
Updated: 2026-04-09T16:17:11.748Z
Reserved: 2026-04-07T19:13:20.377Z
Link: CVE-2026-39844
Updated: 2026-04-09T14:55:51.231Z
Status : Analyzed
Published: 2026-04-08T21:16:59.883
Modified: 2026-04-15T19:08:44.330
Link: CVE-2026-39844
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