CVE-2026-3749: A weakness has been identified in Bytedesk up to 1.3.9

Q: How do I fix CVE-2026-3749?

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

Q: Is CVE-2026-3749 being exploited?

CVE-2026-3749 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-2026-3749 affect?

CVE-2026-3749 affects bytedesk. Severity is medium (CVSS 6.3). 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. Execut

Q: How urgent is CVE-2026-3749?

Priority 37/100. Public exploit reference

Routine

MEDIUM 6.3UPGRADE

CVE-2026-3749 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 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

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	0.4% (top 62%)
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-2026-3749?

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

Is CVE-2026-3749 being exploited?

CVE-2026-3749 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-2026-3749 affect?

CVE-2026-3749 affects bytedesk. Severity is medium (CVSS 6.3). 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. Execut

How urgent is CVE-2026-3749?

Priority 37/100. 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-2026-3748 MEDIUM 6.3 UPGRADE A security flaw has been discovered in Bytedesk up to 1.3.9

References

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