CVE-2026-3748
Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload
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.
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.
- Update the SVG File Handler component.
Public PoC/Exploit Available at Github
CVE-2026-3748 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-2026-3748.
| URL | Resource |
|---|---|
| https://github.com/Bytedesk/bytedesk/ | Product |
| https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7 | Patch |
| https://github.com/Bytedesk/bytedesk/issues/18 | Exploit Vendor Advisory Issue Tracking |
| https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721 | Exploit Vendor Advisory Issue Tracking |
| https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973 | Exploit Vendor Advisory Issue Tracking |
| https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 | Release Notes |
| https://vuldb.com/?ctiid.349726 | Permissions Required |
| https://vuldb.com/?id.349726 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.768028 | 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-2026-3748 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-2026-3748
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-2026-3748 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3748 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/18 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973 Types: Exploit, Issue Tracking, 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.349726 Types: Permissions Required Added Reference Type VulDB: https://vuldb.com/?id.349726 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.768028 Types: Third Party Advisory, VDB Entry -
New CVE Received by [email protected]
Mar. 08, 2026
Action Type Old Value New Value Added 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. 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/18 Added Reference https://github.com/Bytedesk/bytedesk/issues/18#issue-3993448721 Added Reference https://github.com/Bytedesk/bytedesk/issues/18#issuecomment-3976672973 Added Reference https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1 Added Reference https://vuldb.com/?ctiid.349726 Added Reference https://vuldb.com/?id.349726 Added Reference https://vuldb.com/?submit.768028