How serious is CVE-2026-3749?

This vulnerability has a CVSS score of 5.3 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3749?

Yes, proof-of-concept exploit code for CVE-2026-3749 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3749?

CVE-2026-3749 affects bytedesk bytedesk. Check the full CVE details for specific version information.

How do I fix CVE-2026-3749?

To remediate CVE-2026-3749, check for security patches from bytedesk. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3749

Medium

|5.3

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to upload any type of file to the Bytedesk application, which could lead to malicious files being executed on the server. It can be exploited remotely without needing special access, so it's crucial to upgrade to the latest version to fix this issue.

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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$724($500-$1K)

Vendor Response

Grade APatched in 2 days

Quick Information

Published

Mar 8, 2026

about 1 month ago

Last Modified

Mar 10, 2026

28 days ago

Vendor

bytedesk

Product

bytedesk

Related Vulnerabilities

CVE-2026-3748Medium

An attacker can exploit a flaw in Bytedesk to upload malicious files without restriction, which could lead to unauthorized access or control over the system. This vulnerability affects versions up to 1.3.9, and it is crucial to upgrade to version 1.4.5.1 to protect against potential attacks.