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I. Basic Information for CVE-2026-3749
Vulnerability Information

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Vulnerability Title
Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted upload
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
Bytedesk 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bytedesk是bytedesk.com个人开发者的一个全渠道智能客服平台。 Bytedesk 1.3.9及之前版本存在代码问题漏洞,该漏洞源于对文件UploadRestService.java中handleFileUpload函数的操作,可能导致无限制上传。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
-Bytedesk 1.3.0 -
II. Public POCs for CVE-2026-3749
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III. Intelligence Information for CVE-2026-3749
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IV. Related Vulnerabilities
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