---
id: CVE-2026-105429
title: >-
  Improper neutralization of special elements in the NetBird client SSH
  configuration manager (client/ssh/config/manager.go) in NetBird versions
  0.60.0 through 0.74.6 allows a malicious or compromised peer to execute
  arbitrary commands on …
summary: >-
  Improper neutralization of special elements in the NetBird client SSH
  configuration manager (client/ssh/config/manager.go) in NetBird versions
  0.60.0 through 0.74.6 allows a malicious or compromised peer to execute
  arbitrary commands on …
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-78
  - CWE-116
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T05:16:42.487'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105429'
references:
  - url: 'https://github.com/netbirdio/netbird/pull/6805'
    label: 33c584b5-0579-4c06-b2a0-8d8329fcab9c
  - url: 'https://github.com/netbirdio/netbird/releases/tag/v0.74.7'
    label: 33c584b5-0579-4c06-b2a0-8d8329fcab9c
  - url: >-
      https://github.com/netbirdio/netbird/security/advisories/GHSA-xmg2-v32j-x2hf
    label: 33c584b5-0579-4c06-b2a0-8d8329fcab9c
tags:
  - nvd
ingestedAt: '2026-10-14T06:17:13.780Z'
---

## Overview

Improper neutralization of special elements in the NetBird client SSH configuration manager (client/ssh/config/manager.go) in NetBird versions 0.60.0 through 0.74.6 allows a malicious or compromised peer to execute arbitrary commands on other NetBird client hosts. The client writes a system-wide OpenSSH drop-in file (/etc/ssh/ssh_config.d/99-netbird.conf, or the equivalent under %PROGRAMDATA%\ssh\ssh_config.d on Windows) that embeds each peer FQDN or hostname inside a double-quoted Match host directive without escaping. A peer name containing a double quote breaks out of the quoted context and injects arbitrary SSH configuration directives, including exec commands, which run locally as any user on the host the next time that user runs ssh. Desktop clients on Linux, macOS, Windows and FreeBSD are affected; the Android and iOS apps are not. The issue is fixed in version 0.74.7, which accepts a peer FQDN or hostname only if it is a valid DNS name.

## Remediation

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