CVE-2026-25732
CVE-2026-25732 · NiceGUI's Path Traversal via Unsanitized FileUpload.name Enables Arbitrary File Write
This page contains facts from public vulnerability sources. Check the original advisory before updating.
NiceGUI is a Python-based UI framework. Prior to 3.7.0, NiceGUI's FileUpload.name property exposes client-supplied filename metadata without sanitization, enabling path traversal when developers use the pattern UPLOAD_DIR / file.name. Malicious filenames containing ../ sequences allow attackers to write files outside intended directories, with potential for remote code execution through application file overwrites in vulnerable deployment patterns. This design creates a prevalent security footgun affecting applications following common community patterns. Note: Exploitation requires application code incorporating file.name into filesystem paths without sanitization. Applications using fixed paths, generated filenames, or explicit sanitization are not affected. This vulnerability is fixed in 3.7.0.
CVSS 7.5 · High · EPSS 3.4% · Public exploit · Fix available
- Published
- Updated
Stack: python
Affected products and versions
nicegui
- Versions
- < 3.7.0: Affected
No fix published
nicegui PyPI
- Versions
- 0.1.0
- 0.1.4
- 0.1.6
- 0.2.0
- 0.2.1
- 0.2.10
- 0.2.11
- 0.2.12
- 0.2.13
- 0.2.14
- 0.2.15
- 0.2.2
- 0.2.3
- 0.2.4
- 0.2.9
- 0.3.0
- 0.3.1
- 0.3.2
- 0.3.3
- 0.3.4
- 0.3.5
- 0.3.6
- 0.3.7
- 0.3.8
- 0.3.9
- 0.4.0
- 0.4.1
- 0.4.10
- 0.4.11
- 0.4.12
- 0.4.13
- 0.4.14
- 0.4.15
- 0.4.2
- 0.4.3
- 0.4.4
- 0.4.5
- 0.4.6
- 0.4.7
- 0.4.8
- 0.4.9
- 0.5.0
- 0.5.1
- 0.5.10
- 0.5.11
- 0.5.12
- 0.5.2
- 0.5.3
- 0.5.4
- 0.5.5
- 0.5.6
- 0.5.7
- 0.5.8
- 0.5.9
- 0.6.0
- 0.6.1
- 0.6.10
- 0.6.11
- 0.6.12
- 0.6.13
- 0.6.2
- 0.6.3
- 0.6.4
- 0.6.5
- 0.6.6
- 0.6.7
- 0.6.8
- 0.6.9
- 0.7.0
- 0.7.1
- 0.7.10
- 0.7.11
- 0.7.12
- 0.7.13
- 0.7.14
- 0.7.15
- 0.7.16
- 0.7.17
- 0.7.18
- 0.7.19
- 0.7.2
- 0.7.21
- 0.7.22
- 0.7.23
- 0.7.24
- 0.7.25
- 0.7.26
- 0.7.27
- 0.7.28
- 0.7.29
- 0.7.3
- 0.7.30
- 0.7.4
- 0.7.6
- 0.7.7
- 0.7.8
- 0.7.9
- 0.8.0
- 0.8.1
- 0.8.10
- 0.8.11
- 0.8.12
- 0.8.13
- 0.8.14
- 0.8.15
- 0.8.16
- 0.8.2
- 0.8.3
- 0.8.4
- 0.8.5
- 0.8.6
- 0.8.7
- 0.8.8
- 0.8.9
- 0.9.0
- 0.9.1
- 0.9.10
- 0.9.11
- 0.9.12
- 0.9.13
- 0.9.14
- 0.9.15
- 0.9.16
- 0.9.17
- 0.9.18
- 0.9.19
- 0.9.2
- 0.9.20
- 0.9.21
- 0.9.22
- 0.9.23
- 0.9.24
- 0.9.25
- 0.9.26
- 0.9.27
- 0.9.28
- 0.9.3
- 0.9.4
- 0.9.5
- 0.9.6
- 0.9.7
- 0.9.8
- 0.9.9
- 1.0.1
- 1.0.10
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.0.9
- 1.1.0
- 1.1.1
- 1.1.10
- 1.1.11
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.1.6
- 1.1.7
- 1.1.8
- 1.1.9
- 1.2.0
- 1.2.1
- 1.2.10
- 1.2.11
- 1.2.12
- 1.2.13
- 1.2.14
- 1.2.15
- 1.2.16
- 1.2.17
- 1.2.18
- 1.2.2
- 1.2.20
- 1.2.21
- 1.2.22
- 1.2.23
- 1.2.24
- 1.2.3
- 1.2.4
- 1.2.5
- 1.2.6
- 1.2.7
- 1.2.8
- 1.2.9
- 1.3.0
- 1.3.1
- 1.3.10
- 1.3.11
- 1.3.12
- 1.3.13
- 1.3.14
- 1.3.15
- 1.3.16
- 1.3.17
- 1.3.18
- 1.3.2
- 1.3.3
- 1.3.4
- 1.3.5
- 1.3.6
- 1.3.7
- 1.3.8
- 1.3.9
- 1.4.0
- 1.4.1
- 1.4.10
- 1.4.11
- 1.4.12
- 1.4.13
- 1.4.14
- 1.4.15
- 1.4.16
- 1.4.17
- 1.4.18
- 1.4.19
- 1.4.2
- 1.4.20
- 1.4.21
- 1.4.22
- 1.4.23
- 1.4.24
- 1.4.25
- 1.4.26
- 1.4.27
- 1.4.28
- 1.4.29
- 1.4.3
- 1.4.30
- 1.4.31
- 1.4.33
- 1.4.34
- 1.4.35
- 1.4.36
- 1.4.37
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.4.9
- 2.0.0
- 2.0.1
- 2.1.0
- 2.10.0
- 2.10.1
- 2.11.0
- 2.11.1
- 2.12.0
- 2.12.1
- 2.13.0
- 2.14.0
- 2.14.1
- 2.15.0
- 2.16.0
- 2.16.1
- 2.17.0
- 2.18.0
- 2.19.0
- 2.2.0
- 2.20.0
- 2.21.0
- 2.21.1
- 2.22.0
- 2.22.1
- 2.22.2
- 2.23.0
- 2.23.1
- 2.23.2
- 2.23.3
- 2.24.0
- 2.24.1
- 2.24.2
- 2.3.0
- 2.4.0
- 2.5.0
- 2.7.0
- 2.8.0
- 2.8.1
- 2.9.0
- 2.9.1
- 3.0.0
- 3.0.0rc1
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.1.0
- 3.2.0
- 3.3.0
- 3.3.1
- 3.4.0
- 3.4.1
- 3.5.0
- 3.6.0
- 3.6.1
- Affected ranges
- ECOSYSTEM: < 3.7.0
Update to 3.7.0
Original sources
- https://github.com/zauberzeug/nicegui/security/advisories/GHSA-9ffm-fxg3-xrhh
- https://github.com/zauberzeug/nicegui/blob/main/nicegui/elements/upload_files.py#L110-L115
- https://github.com/zauberzeug/nicegui/blob/main/nicegui/elements/upload_files.py#L79-L82
- https://nvd.nist.gov/vuln/detail/CVE-2026-25732