PyPI/nicegui CVE-2026-39844: high 7.5, EPSS 0.39%

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 backsl

Action: Upgrade nicegui to 3.10.0 or later.

pip install nicegui==3.10.0

Affected

Fixed versions

Sources

• osv: PYSEC-2026-2234
• https://github.com/zauberzeug/nicegui/releases/tag/v3.10.0
• https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w8wv-vfpc-hw2w
• https://github.com/zauberzeug/nicegui/commit/d38a702e3af2da5b0708f689be8d71413fc77056

CVE-2026-39844 · published 2026-04-08T21:16:59.883Z · modified 2026-07-13T07:15:35.271485695Z · JSON