RCE in Netbird
CVE-2026-105429
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.
Vulnerability class: Command Injection (OS Command Injection)
Published .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (vendor-advisory)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (patch)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (release-notes)
Frequently asked questions
- What is CVE-2026-105429?
- CVE-2026-105429 is a high-severity vulnerability in Netbird, classified under OS Command Injection. CVSS score: 8.0/10. Published 2026-10-14.
- How severe is CVE-2026-105429?
- High severity. CVSS v3 base score is 8.0 out of 10.