CVE-2026-3748

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.

• CWE-284
• CWE-434
• CWE-434

• https://github.com/Bytedesk/bytedesk/Product
• https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7Patch
• https://github.com/Bytedesk/bytedesk/issues/18Exploit, Issue Tracking, Vendor Advisory
• https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721Exploit, Issue Tracking, Vendor Advisory
• https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973Exploit, Issue Tracking, Vendor Advisory
• https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1Release Notes
• https://vuldb.com/?ctiid.349726Permissions Required
• https://vuldb.com/?id.349726Third Party Advisory, VDB Entry
• https://vuldb.com/?submit.768028Third Party Advisory, VDB Entry

Published

Mar 8, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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