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5.3
Bytedesk SVG File Handler Allows Unrestricted File Upload
CVE-2026-3748
Summary
A security flaw in Bytedesk versions up to 1.3.9 allows attackers to upload any file without restriction. This means that a hacker could potentially upload malicious files to your server. To fix this, update to Bytedesk version 1.4.5.1, which has a patch available.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| bytedesk | bytedesk | <= 1.4.5.1 | – |
Original title
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 com...
Original 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.
nvd CVSS2.0
6.5
nvd CVSS3.1
6.3
nvd CVSS4.0
5.3
Vulnerability type
CWE-284
Improper Access Control
CWE-434
Unrestricted File Upload
- https://github.com/Bytedesk/bytedesk/
- https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64...
- https://github.com/Bytedesk/bytedesk/issues/18
- https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721
- https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973
- https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1
- https://vuldb.com/?ctiid.349726
- https://vuldb.com/?id.349726
- https://vuldb.com/?submit.768028
Published: 8 Mar 2026 · Updated: 13 Mar 2026 · First seen: 8 Mar 2026