CVE-2026-3748— Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload
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I. Basic Information for CVE-2026-3748
Vulnerability Information
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Vulnerability Title
Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload
Source: NVD (National Vulnerability Database)
Vulnerability 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.
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UploadRestController.java中uploadFile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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | Bytedesk | 1.3.0 | - |
II. Public POCs for CVE-2026-3748
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Unrestricted Upload of File with Dangerous Type · Issue #18 · Bytedesk/bytedeskexploitissue-tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-3748
Same Patch Batch · n/a · 2026-03-08 · 10 CVEs total
| CVE-2026-3787 | 7.0 HIGH | UltraVNC Windows Service cryptbase.dll uncontrolled search path |
| CVE-2026-3789 | 6.3 MEDIUM | Bytedesk SpringAIGiteeRestController SpringAIGiteeRestService.java getModels server-side r |
| CVE-2026-3788 | 6.3 MEDIUM | Bytedesk SpringAIOpenrouterRestController SpringAIOpenrouterRestService.java getModels ser |
| CVE-2026-3786 | 6.3 MEDIUM | EasyCMS Request Parameter RbacuserAction.class.php sql injection |
| CVE-2026-3785 | 6.3 MEDIUM | EasyCMS Request Parameter RbacnodeAction.class.php sql injection |
| CVE-2026-3749 | 6.3 MEDIUM | Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted upload |
| CVE-2026-3731 | 5.3 MEDIUM | libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds |
| CVE-2026-3750 | 4.7 MEDIUM | ContiNew Admin Storage Management S3ClientFactory.java URI.create server-side request forg |
| CVE-2026-3714 | 4.7 MEDIUM | OpenCart Incomplete Fix CVE-2024-36694 template.php save special elements used in a templa |
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V. Comments for CVE-2026-3748
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