HOME VULNERABILITIESCVE-2026-3749

HIGH

CVE-2026-3749

CWE-284Published: March 8, 2026· Updated: Mar 10, 2026

8.8

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.1th

Official Description

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.

Technical Analysis

CVE-2026-3749 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

bytedesk1 product

bytedesk

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7

ADVISORYhttps://github.com/Bytedesk/bytedesk/issues/19

ADVISORYhttps://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676

ADVISORYhttps://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845

ADVISORYhttps://vuldb.com/?id.349727

ADVISORYhttps://vuldb.com/?submit.768030

All References (9)

→

https://github.com/Bytedesk/bytedesk/Product

→

https://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7Patch

→

https://github.com/Bytedesk/bytedesk/issues/19Exploit · Vendor Advisory

→

https://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676Exploit · Vendor Advisory

→

https://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845Exploit · Vendor Advisory

→

https://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1Release Notes

→

https://vuldb.com/?ctiid.349727Permissions Required · VDB Entry

→

https://vuldb.com/?id.349727Third Party Advisory · VDB Entry

→

https://vuldb.com/?submit.768030Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2026-3749

CVSS Score8.8 / 10

SeverityHIGH

WeaknessCWE-284

CISA KEVNo

EPSS (30d)0.06%

Affected1 vendor

PublishedMar 8, 2026

Related CVEs (CWE-284)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2026-3749 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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