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Vulnerabilities

Vulnerability · CVE-2026-3748

A security flaw has been discovered in Bytedesk up to 1.3.9.

Published Mar 8, 2026 · catalog updated Jun 17, 2026 · A security flaw has

Check if you run it

No confirmed exploitation is on record for CVE-2026-3748. EPSS is 0.69%. Act only if a listed version of A security flaw has is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A security flaw has).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.69%
Remediation
Advisory link
Affected products
cpe bytedesk/bytedesk

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe bytedesk/bytedeskversion unspecified

How to fix CVE-2026-3748

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3748. EPSS is 0.69%. Act only if a listed version of A security flaw has is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-284: Improper Access Control; CWE-434: Unrestricted Upload of File with Dangerous Type. EPSS 0.69%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 8, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-3748

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3748

    30-day exploitation probability 0.7%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3748

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.