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TI-2026-03239 Aliases CVE-2026-3749GHSA-995q-rmr5-rrmg

Bytedesk SVG File UploadRestService.java handleFileUpload 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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0048 41st 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-2026-3749
  2. 2026-10-03 Alias added: GHSA-995q-rmr5-rrmg
  3. 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-2026-03238 Bytedesk SVG File UploadRestController.java uploadFile 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