CVE-2026-3749

Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted upload

State: Published
Severity: 5.3 Medium
Published: Mar 8, 2026
Updated: Mar 11, 2026
Reserved: Mar 7, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-434 Unrestricted Upload
CWE-284 Improper Access Controls

Affected Products

Product	Versions
Bytedeskn/a	1.3.0Affected 1.3.1Affected 1.3.2Affected 1.3.3Affected 1.3.4Affected 1.3.5Affected 1.3.6Affected 1.3.7Affected 1.3.8Affected 1.3.9Affected 1.4.5.1Not affected

References

VDB-349727 | Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted uploadvdb-entrytechnical-description
VDB-349727 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #768030 | Bytedesk <=1.3.9 Unrestricted Upload of File with Dangerous Type (CWE-434)third-party-advisory
https://github.com/Bytedesk/bytedesk/issues/19issue-tracking
https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845issue-tracking
https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676exploitissue-tracking
https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7patch
https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1patch
https://github.com/Bytedesk/bytedesk/product

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