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VULNERABILITIES

CVE-2026-50873 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CNA: CISA-ADPCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gist.github.com/pyuysig/ab0af5b10877fb906941e05a69b202a7 CISA-ADPExploitTechnical Description
https://gist.github.com/pyuysig/ab0af5b10877fb906941e05a69b202a7 [email protected]ExploitTechnical Description

Weakness Enumeration

CWE-IDCWE NameSource
CWE-434Unrestricted Upload of File with Dangerous TypeCISA-ADP

Affected Products

ProductVersions
flatnotes
5.5.4 (semver)

CPE

  • No CPEs found in CPE dictionary for this product.

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-50873
NVD Published Date:
Jun 15, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]