How severe is CVE-2026-3748?

CVE-2026-3748 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-3748 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3748?

CVE-2026-3748 affects Bytedesk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3748?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3748 have an EU (EUVD) identifier?

Yes. CVE-2026-3748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10251.

When was CVE-2026-3748 published?

CVE-2026-3748 was published on 2026-03-08 and last updated on 2026-06-17.

CVE-2026-3748

CVE-2026-3748 is a medium-severity vulnerability in Bytedesk with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10251
Weakness: CWE-434
Affected product: Bytedesk
Published: 2026-03-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-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. 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.
How severe is CVE-2026-3748?: CVE-2026-3748 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-3748 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3748?: CVE-2026-3748 affects Bytedesk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3748?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3748 have an EU (EUVD) identifier?: Yes. CVE-2026-3748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10251.
When was CVE-2026-3748 published?: CVE-2026-3748 was published on 2026-03-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:bytedesk:bytedesk:*:*:*:*:*:*:*:*

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