VULNERABILITY INTELLIGENCE
CVE-2026-50873
CVSS score9.8 CRITICAL
EPSS probability0.44%
CISA KEVNot currently listed
Published2026-06-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
An arbitrary file upload vulnerability in the attachment handling component of flatnotes v5.5.4 allows attackers to execute arbitrary code via uploading a crafted HTML or SVG file.
Weakness classification
- CWE-434: Unrestricted Upload of File with Dangerous Type