CVE-2026-3749: Bytedesk

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A weakness has been identified in Bytedesk up to 1.3.9. This vulnerability affects the function handleFileUpload of the file source-code/src/main/java/com/bytedesk/core/upload/UploadRestService.java of the component SVG File Handler. Executing a manipulation can lead to unrestricted upload. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 1.4.5.1 is able to resolve this issue. This patch is called 975e39e4dd527596987559f56c5f9f973f64eff7. It is recommended to upgrade the affected component.

Affected products

• Bytedesk Bytedesk: before 1.4.5.1 (fixed in 1.4.5.1)

Published 2026-03-08. Last modified 2026-06-17.