Skip to content
Heist/ feed
High

NetBird client SSH config Match line injection via peer FQDN or hostname allows local command execution

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-105429

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-105429

NetBird

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:2.3:a:netbird:netbird:*:*:*:*:*:*:*:*"
    ],
    "repo": "https://github.com/netbirdio/netbird",
    "vendor": "NetBird",
    "modules": [
      "client/ssh/config"
    ],
    "product": "NetBird",
    "versions": [
      {
        "status": "affected",
        "version": "0.60.0",
        "lessThan": "0.74.7",
        "versionType": "semver"
      }
    ],
    "platforms": [
      "Linux",
      "macOS",
      "Windows",
      "FreeBSD"
    ],
    "packageName": "github.com/netbirdio/netbird",
    "programFiles": [
      "client/ssh/config/manager.go"
    ],
    "collectionURL": "https://pkg.go.dev",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-105429

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#32647 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement