Java CVE-2026-3749
LOWCVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
6DescriptionNVD
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.
AnalysisAI
Unrestricted file upload in Bytedesk versions up to 1.3.9 allows authenticated remote attackers to upload arbitrary SVG files through the handleFileUpload function in UploadRestService.java. Public exploit code exists for this vulnerability, and attackers can leverage it to bypass file upload restrictions and potentially execute malicious content. …
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RemediationAI
Within 30 days: Identify affected systems running Bytedesk and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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External POC / Exploit Code
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