CVE-2026-3749
Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted upload
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.
INFO
Published Date :
March 8, 2026, 4:16 p.m.
Last Modified :
March 10, 2026, 6:52 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Upgrade Bytedesk to version 1.4.5.1.
- Apply the patch 975e39e4dd527596987559f56c5f9f973f64eff7.
- Ensure the SVG File Handler is updated.
Public PoC/Exploit Available at Github
CVE-2026-3749 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3749.
| URL | Resource |
|---|---|
| https://github.com/Bytedesk/bytedesk/ | Product |
| https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7 | Patch |
| https://github.com/Bytedesk/bytedesk/issues/19 | Exploit Vendor Advisory |
| https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676 | Exploit Vendor Advisory |
| https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845 | Exploit Vendor Advisory |
| https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 | Release Notes |
| https://vuldb.com/?ctiid.349727 | Permissions Required VDB Entry |
| https://vuldb.com/?id.349727 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.768030 | Third Party Advisory VDB Entry |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3749 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3749
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3749 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3749 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 10, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-434 Added CPE Configuration OR *cpe:2.3:a:bytedesk:bytedesk:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.5.1 Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/ Types: Product Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7 Types: Patch Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/issues/19 Types: Exploit, Vendor Advisory Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676 Types: Exploit, Vendor Advisory Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845 Types: Exploit, Vendor Advisory Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 Types: Release Notes Added Reference Type VulDB: https://vuldb.com/?ctiid.349727 Types: Permissions Required, VDB Entry Added Reference Type VulDB: https://vuldb.com/?id.349727 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.768030 Types: Third Party Advisory, VDB Entry -
New CVE Received by [email protected]
Mar. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CWE CWE-284 Added CWE CWE-434 Added Reference https://github.com/Bytedesk/bytedesk/ Added Reference https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7 Added Reference https://github.com/Bytedesk/bytedesk/issues/19 Added Reference https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676 Added Reference https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845 Added Reference https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 Added Reference https://vuldb.com/?ctiid.349727 Added Reference https://vuldb.com/?id.349727 Added Reference https://vuldb.com/?submit.768030