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CVE-2026-39844 NiceGUI has a Path Traversal in NiceGUI Upload Filename on Windows via Backslash Bypass of PurePosixPath Sanitization

🗓️ 08 Apr 2026 20:13:31Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 39 Views

NiceGUI Windows backslash filename bypasses PurePosixPath, enabling file writes; fixed 3.10.0.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cnnvd
CNNVD
NiceGUI path traversal vulnerability
8 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-39844
8 Apr 202620:13
–cve
euvd
EUVD
EUVD-2026-20610
8 Apr 202615:04
–euvd
github
Github Security Blog
NiceGUI: Upload filename sanitization bypass via backslashes allows path traversal on Windows
8 Apr 202615:04
–github
mend
Mend
CVE-2026-39844
8 Apr 202620:13
–mend
nvd
NVD
CVE-2026-39844
8 Apr 202621:16
–nvd
osv_ghsa
osv_ghsa
GHSA-W8WV-VFPC-HW2W NiceGUI: Upload filename sanitization bypass via backslashes allows path traversal on Windows
8 Apr 202615:04
–osv_ghsa
osv_pysec
osv_pysec
PYSEC-2026-2234
8 Apr 202621:16
–osv_pysec
ptsecurity
Positive Technologies
PT-2026-31353
8 Apr 202600:00
–ptsecurity
pypa
PyPA
PYSEC-2026-2234
8 Apr 202621:16
–pypa
Rows per page
[
  {
    "vendor": "zauberzeug",
    "product": "nicegui",
    "versions": [
      {
        "version": "< 3.10.0",
        "status": "affected"
      }
    ]
  }
]

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