CVE-2026-105429 (GCVE-0-2026-105429)

Vulnerability from cvelistv5 – Published: 2026-10-14 04:33 – Updated: 2026-10-14 04:33
VLAI
Title
NetBird client SSH config Match line injection via peer FQDN or hostname allows local command execution
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 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.
Severity
8.9 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
8 (High)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-116 - Improper Encoding or Escaping of Output
Assigner
securin CNA under the mitre root
CNA scorecard B 80/100 over 71 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
NetBird NetBird Affected: 0.60.0 , < 0.74.7 (semver)
    cpe:2.3:a:netbird:netbird:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Arjun Basnet from Securin
Show details on NVD website
To clipboard 

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        }
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          "name": "Fix pull request #6805",
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          "url": "https://github.com/netbirdio/netbird/pull/6805"
        },
        {
          "name": "NetBird v0.74.7 release",
          "tags": [
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          "url": "https://github.com/netbirdio/netbird/releases/tag/v0.74.7"
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      ],
      "solutions": [
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          "value": "Upgrade the NetBird client to version 0.74.7 or later. In this version, buildHostPatterns accepts a peer FQDN or hostname only if it is a plain DNS name, and rejects quotes, whitespace, newlines, commas and SSH pattern metacharacters (pull request #6805)."
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          "time": "2026-07-15T00:00:00.000Z",
          "value": "Vendor accepted the report"
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          "time": "2026-07-17T00:00:00.000Z",
          "value": "Fix released in version 0.74.7"
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          "time": "2026-09-01T00:00:00.000Z",
          "value": "Vendor advisory GHSA-xmg2-v32j-x2hf published"
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          "value": "CVE ID assigned"
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    "datePublished": "2026-10-14T04:33:44.856Z",
    "dateReserved": "2026-10-05T12:51:29.957Z",
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    "state": "PUBLISHED"
  },
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  }
}



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