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CVE-2026-50873

CRITICAL CVSS 9.8 View on NVD ↗

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Published: Jun 15, 2026 20:16 UTC Modified: Jun 16, 2026 15:50 UTC