CVE-2026-3748: A security flaw has been discovered in Bytedesk up to 1.3.9

Q: How do I fix CVE-2026-3748?

bytedesk: upgrade to 1.4.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-3748 being exploited?

CVE-2026-3748 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3748 affect?

CVE-2026-3748 affects bytedesk. Severity is medium (CVSS 6.3). 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 manip

Q: How urgent is CVE-2026-3748?

Priority 38/100. Public exploit reference

Routine

MEDIUM 6.3UPGRADE

CVE-2026-3748 is a medium-severity flaw (CVSS 6.3) affecting bytedesk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 t

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-284, CWE-434
Published	2026-03-08
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: bytedesk

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-08 16:16 UTCPublished CVE record published
2026-06-17 10:44 UTCUpdated Record last modified

bytedesk bytedesk UPGRADE

Affected: < 1.4.5.1

Fixed in: 1.4.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bytedesk || rpm -q bytedesk || bytedesk --version

2. UPGRADE to 1.4.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bytedesk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bytedesk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3748?

bytedesk: upgrade to 1.4.5.1. Exact commands for each OS are on this page.

Is CVE-2026-3748 being exploited?

CVE-2026-3748 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3748 affect?

CVE-2026-3748 affects bytedesk. Severity is medium (CVSS 6.3). 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 manip

How urgent is CVE-2026-3748?

Priority 38/100. Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2026-3789 MEDIUM 6.3 UPGRADE A vulnerability was detected in Bytedesk up to 1.3.9
CVE-2026-3788 MEDIUM 6.3 UPGRADE A security vulnerability has been detected in Bytedesk up to 1.3.9
CVE-2026-3749 MEDIUM 6.3 UPGRADE A weakness has been identified in Bytedesk up to 1.3.9

References

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