Unrestricted File Upload Vulnerability in Bytedesk SVG File Handler
CVE-2026-3748

5.3MEDIUM

Key Information:

Vendor

Bytedesk

Status
Bytedesk
Vendor
CVE Published:
8 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3748?

A security flaw has been identified in the Bytedesk application, specifically in the SVG File Handler component within the uploadFile function. This vulnerability allows unauthorized users to upload files without restrictions, which may lead to remote attacks. An exploit has been publicly disclosed, making systems running versions up to 1.3.9 susceptible to manipulation. It is advisable to upgrade to version 1.4.5.1, which includes a patch to address this issue, ensuring that the application remains secure against potential threats.

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Affected Version(s)

Bytedesk 1.3.0

Bytedesk 1.3.1

Bytedesk 1.3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3748 - Proof of Concept

References

https://vuldb.com/?id.349726
vdb-entrytechnical-description
https://vuldb.com/?ctiid.349726
signaturepermissions-required
https://vuldb.com/?submit.768028
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ZAST.AI (VulDB User)
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