NoMachine nxhtd Server-Side Request Forgery Information Disclosure Vulnerability

September 16th, 2026
ZDI-26-712 ZDI-CAN-31619

CVE ID

CVE-2026-92210

CVSS Score

7.2 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected Vendors

NoMachine

Affected Products

NoMachine

Vulnerability Details

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.

Additional Details

Fixed in NoMachine v10.1.7, v9.9.6 and v8.27.1
https://kb.nomachine.com/software-updates


Disclosure Timeline

  • 2026-08-07 - Vulnerability reported to vendor
  • 2026-09-16 - Coordinated public release of advisory
  • 2026-09-16 - Advisory Updated

Credit

Niels Pfau (Mantodea Security GmbH)

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