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CVE-2026-105429— NetBird client SSH config Match line injection via peer FQDN or hostname allows local command execution

Quick assessment

Affected
NetBird NetBird
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 ho

CVSS 8.0 · High EPSS 0.58% · P47

Affected Version Matrix 1

VendorProduct Version RangeStatus
NetBird NetBird 0.60.0< 0.74.7 affected
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I. Basic Information for CVE-2026-105429

Vulnerability Information

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Vulnerability Title
NetBird client SSH config Match line injection via peer FQDN or hostname allows local command execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NetBird NetBird 0.60.0 ~ 0.74.7 cpe:2.3:a:netbird:netbird:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-105429

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III. Intelligence Information for CVE-2026-105429

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Patches & Fixes for CVE-2026-105429 (1)

Other References for CVE-2026-105429 (2)

IV. Related Vulnerabilities

Same product: NetBird
Same weakness: CWE-78

V. Comments for CVE-2026-105429

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