CVE-2026-3748

Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload

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

Description

A security flaw has been discovered in Bytedesk up to 1.3.9. This affects the function uploadFile of the file source-code/src/main/java/com/bytedesk/core/upload/UploadRestController.java of the component SVG File Handler. Performing a manipulation results in unrestricted upload. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.4.5.1 is able to mitigate this issue. The patch is named 975e39e4dd527596987559f56c5f9f973f64eff7. Upgrading the affected component is recommended.

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-349726 | Bytedesk SVG File UploadRestController.java uploadFile unrestricted uploadvdb-entrytechnical-description
VDB-349726 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #768028 | Bytedesk <=1.3.9 Unrestricted Upload of File with Dangerous Type (CWE-434)third-party-advisory
https://github.com/Bytedesk/bytedesk/issues/18issue-tracking
https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973issue-tracking
https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721exploitissue-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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