What’s Vulnerable › Vulnerabilities

CVE-2026-3748: Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-08 · updated 2026-06-17
• Weakness: CWE-284

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.

Affected products

• Bytedesk: before 1.4.5.1 — fixed in 1.4.5.1

How to fix

Upgrade to a fixed version: Bytedesk 1.4.5.1. Check the vendor advisory for mitigations.

References

• https://github.com/Bytedesk/bytedesk/
• https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7
• 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

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