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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.

PUBLISHED Reserved 2026-03-07 | Published 2026-03-08 | Updated 2026-03-08 | Assigner VulDB




MEDIUM: 5.3CVSS: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
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Problem types

Unrestricted Upload

Improper Access Controls

Timeline

2026-03-07:Advisory disclosed
2026-03-07:VulDB entry created
2026-03-07:VulDB entry last update

Credits

ZAST.AI (VulDB User) reporter

References

vuldb.com/?id.349726 (VDB-349726 | Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload) vdb-entry technical-description

vuldb.com/?ctiid.349726 (VDB-349726 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/?submit.768028 (Submit #768028 | Bytedesk <=1.3.9 Unrestricted Upload of File with Dangerous Type (CWE-434)) third-party-advisory

github.com/Bytedesk/bytedesk/issues/18 issue-tracking

github.com/Bytedesk/bytedesk/issues/18 issue-tracking

github.com/Bytedesk/bytedesk/issues/18 exploit issue-tracking

github.com/...ommit/975e39e4dd527596987559f56c5f9f973f64eff7 patch

github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 patch

github.com/Bytedesk/bytedesk/ product

cve.org (CVE-2026-3748)

nvd.nist.gov (CVE-2026-3748)

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