---
id: CVE-2026-38820
title: >-
  openNDS before 11.0.0 is susceptible to unauthenticated OS command execution
  via shell command injection through the fas query parameter on the
  /opennds_preauth/ endpoint because of libopennds.sh.
summary: >-
  openNDS before 11.0.0 is susceptible to unauthenticated OS command execution
  via shell command injection through the fas query parameter on the
  /opennds_preauth/ endpoint because of libopennds.sh.
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-78
published: '2026-08-28'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:54:36.797'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-38820'
references:
  - url: >-
      https://github.com/openNDS/openNDS/commit/8c03750d9a17d601fa7bd03ae7cde20c7c8d1252
    label: cve@mitre.org
tags:
  - nvd
epss: 0.02869
epssPercentile: 0.86214
ingestedAt: '2026-09-09T16:14:05.517Z'
---

## Overview

openNDS before 11.0.0 is susceptible to unauthenticated OS command execution via shell command injection through the fas query parameter on the /opennds_preauth/ endpoint because of libopennds.sh.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.