CVE-2026-25732: high-severity vulnerability in zauberzeug nicegui
NiceGUI's Path Traversal via Unsanitized FileUpload.name Enables Arbitrary File Write
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 3.4%
from disclosure to weapon2 days
Published on NVDFeb 6
1st PoC+2d
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
zauberzeug · niceguipublic PoCs found — 2
exploitdbwww.exploit-db.com/exploits/52534unverifiedgithubgithub.com/mbanyamer/CVE-2026-25732-NiceGUI-3.6.1★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — zauberzeug nicegui
In the same product, most dangerous first.
CVE-2025-66645HIGHNiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File ReadingEPSS 1.2%CVE-2024-32005HIGHLocal File Inclusion in NiceGUI leaflet componentEPSS 0.8%CVE-2026-33332MEDIUMNiceGUI's unvalidated chunk size parameter in media routes can cause memory exhaustionEPSS 0.6%CVE-2026-21874MEDIUMNiceGUI has Redis connection leak via tab storage causes service degradationEPSS 0.6%CVE-2025-21618HIGHNiceGUI On Air authentication issueEPSS 0.4%CVE-2026-39844MEDIUMNiceGUI has a Path Traversal in NiceGUI Upload Filename on Windows via Backslash Bypass of PurePosixPath SanitizationEPSS 0.4%