Read the docs
TI-2026-03238 Aliases CVE-2026-3748GHSA-x2c8-qgvg-23wq

Bytedesk SVG File UploadRestController.java uploadFile unrestricted upload

Priority MEDIUM 57CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass, Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284 and CWE-434.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00548 46th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD and the CNA
Fix Fixed Bytedesk: 1.4.5.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Bytedesk1.3.0; 1.3.1; 1.3.2; 1.3.3; 1.3.4; 1.3.5; 1.3.6; 1.3.7; 1.3.8; 1.3.91.4.5.1Patch availableCNA
  • Bytedesk Vendor— Affected 1.3.0; 1.3.1; 1.3.2; 1.3.3; 1.3.4; 1.3.5; 1.3.6; 1.3.7; 1.3.8; 1.3.9 Fixed in 1.4.5.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:bytedesk:bytedesk:*:*:*:*:*:*:*:*before 1.4.5.1VulnerableBytedesk
  • cpe:2.3:a:bytedesk:bytedesk:*:*:*:*:*:*:*:* Versions before 1.4.5.1 Vulnerable ·Bytedesk

Remediation

  • Fix · CNA Bytedesk Fixed in 1.4.5.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3748
  2. 2026-10-03 Alias added: GHSA-x2c8-qgvg-23wq
  3. 2026-10-05 EPSS moved to the 50th–90th percentile
  4. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 3

Patch 2

Other 1

  • TI-2026-03278 Bytedesk SpringAIGiteeRestController SpringAIGiteeRestService.java getModels server-side request forgery CVSS 4.0MEDIUM 5.3
  • TI-2026-03277 Bytedesk SpringAIOpenrouterRestController SpringAIOpenrouterRestService.java getModels server-side request forgery CVSS 4.0MEDIUM 5.3
  • TI-2026-03239 Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted upload CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences