NoMachine nxhtd Server-Side Request Forgery Information Disclosure Vulnerability. This vulnerability allows remote attackers to initiate arbitrary server-side requests on affected installations of NoMachine. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on UDP port 4443 by default. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker can leverage this vulnerability to initiate requests in the context of the service account. Was ZDI-CAN-31619.
Fix
Vendor advisories in the News 1
- ZDI-26-712: NoMachine nxhtd Server-Side Request Forgery Information Disclosure Vulnerability Zero Day Initiative: published advisories · 2026-09-16
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 17:34
- StatusReceived → PublishedNVD modified 2026-10-21 17:16
- StatusPublished → ReceivedNVD modified 2026-10-21 18:17
- First seenCVSS 7.2 · nomachineNVD modified 2026-10-21 17:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.