CVE-2026-50873: n/a
An arbitrary file upload vulnerability exists in the attachment handling component of flatnotes version 5.5.4. This vulnerability allows attackers to upload crafted HTML or SVG files, which can lead to arbitrary code execution. No patch or official remediation information is currently available. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-50873 describes an arbitrary file upload vulnerability in flatnotes v5.5.4's attachment handling component. Attackers can exploit this flaw by uploading specially crafted HTML or SVG files, potentially enabling execution of arbitrary code on the affected system. The vulnerability is publicly disclosed but lacks a CVSS score and no remediation details or patches have been provided yet.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary code on the system running flatnotes v5.5.4 by uploading malicious HTML or SVG files. This could lead to system compromise depending on the privileges of the application and the environment it runs in. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict or disable file upload functionality if possible, and implement file type validation and filtering to block HTML and SVG uploads.
CVE-2026-50873: n/a
Description
An arbitrary file upload vulnerability exists in the attachment handling component of flatnotes version 5.5.4. This vulnerability allows attackers to upload crafted HTML or SVG files, which can lead to arbitrary code execution. No patch or official remediation information is currently available. There are no known exploits in the wild at this time.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-50873 describes an arbitrary file upload vulnerability in flatnotes v5.5.4's attachment handling component. Attackers can exploit this flaw by uploading specially crafted HTML or SVG files, potentially enabling execution of arbitrary code on the affected system. The vulnerability is publicly disclosed but lacks a CVSS score and no remediation details or patches have been provided yet.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary code on the system running flatnotes v5.5.4 by uploading malicious HTML or SVG files. This could lead to system compromise depending on the privileges of the application and the environment it runs in. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict or disable file upload functionality if possible, and implement file type validation and filtering to block HTML and SVG uploads.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-07T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3052f20b89be6888827a1b
Added to database: 6/15/2026, 7:30:58 PM
Last enriched: 6/15/2026, 8:01:23 PM
Last updated: 6/16/2026, 6:07:31 AM
Views: 6
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