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CVE-2026-3749

6.3 · MEDIUM

A weakness has been identified in Bytedesk up to 1.3.9.

Published Mar 8, 2026CWE-284EPSS 0.70%

Overview

CVE-2026-3749 is a medium-severity vulnerability. It was published on March 8, 2026 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A weakness has been identified in Bytedesk up to 1.3.9. This vulnerability affects the function handleFileUpload of the file source-code/src/main/java/com/bytedesk/core/upload/UploadRestService.java of the component SVG File Handler. Executing a manipulation can lead to unrestricted upload. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 1.4.5.1 is able to resolve this issue. This patch is called 975e39e4dd527596987559f56c5f9f973f64eff7. It is recommended to upgrade the affected component.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Bytedesk/bytedesk/GitHubgithub.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7GitHubgithub.com/Bytedesk/bytedesk/issues/19GitHubgithub.com/Bytedesk/bytedesk/issues/19#issue-3993480676GitHubgithub.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845GitHubgithub.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1Refvuldb.com/?ctiid.349727Refvuldb.com/?id.349727Refvuldb.com/?submit.768030

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3749?

CVE-2026-3749 is a medium-severity vulnerability. It was published on March 8, 2026 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2026-3749?

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-3749?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-3749?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3749 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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