CVE-2026-3749 Details
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.
A vulnerability allowing unrestricted upload of SVG files has been identified in Bytedesk versions through 1.3.9. This issue arises in the 'handleFileUpload' function within 'UploadRestService.java', part of the SVG File Handler component. The vulnerability can be exploited remotely, as the upload endpoint does not properly sanitize SVG files before processing. This flaw has been publicly disclosed and could be used for malicious attacks.
Users are advised to upgrade to Bytedesk version 1.4.5.1, which addresses this vulnerability. The update is available as a Docker image and can also be downloaded as a zip file from the Bytedesk GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Bytedesk/bytedesk/ | [email protected] | Product |
| https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7 | [email protected] | Patch |
| https://github.com/Bytedesk/bytedesk/issues/19 | [email protected] | ExploitVendor Advisory |
| https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676 | [email protected] | ExploitVendor Advisory |
| https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845 | [email protected] | ExploitVendor Advisory |
| https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 | [email protected] | Release Notes |
| https://vuldb.com/?ctiid.349727 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.349727 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.768030 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-434 | Unrestricted Upload of File with Dangerous Type | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
| CWE-434 | Unrestricted Upload of File with Dangerous Type | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| bytedesk bytedesk | < 1.4.5.1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 10, 2026 | Initial Analysis | [email protected] |
| Mar 8, 2026 | New CVE Received | [email protected] |