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2 vulnerabilities by NetBird
CVE-2026-105429 (GCVE-0-2026-105429)
Vulnerability from nvd – Published: 2026-10-14 04:33 – Updated: 2026-10-14 04:33
VLAI
EPSS
VEX
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
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/netbirdio/netbird/security/adv… | vendor-advisory |
| https://github.com/netbirdio/netbird/pull/6805 | patch |
| https://github.com/netbirdio/netbird/releases/tag… | release-notes |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"cpes": [
"cpe:2.3:a:netbird:netbird:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"client/ssh/config"
],
"packageName": "github.com/netbirdio/netbird",
"platforms": [
"Linux",
"macOS",
"Windows",
"FreeBSD"
],
"product": "NetBird",
"programFiles": [
"client/ssh/config/manager.go"
],
"repo": "https://github.com/netbirdio/netbird",
"vendor": "NetBird",
"versions": [
{
"lessThan": "0.74.7",
"status": "affected",
"version": "0.60.0",
"versionType": "semver"
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]
}
],
"credits": [
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"type": "finder",
"value": "Arjun Basnet from Securin"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
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"type": "CWE"
}
]
},
{
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{
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"description": "CWE-116 Improper Encoding or Escaping of Output",
"lang": "en",
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}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T04:33:44.856Z",
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"references": [
{
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"tags": [
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},
{
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"tags": [
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],
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{
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],
"solutions": [
{
"lang": "en",
"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)."
}
],
"source": {
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"discovery": "EXTERNAL"
},
"timeline": [
{
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{
"lang": "en",
"time": "2026-07-17T00:00:00.000Z",
"value": "Fix released in version 0.74.7"
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"time": "2026-10-05T00:00:00.000Z",
"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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CVE-2026-105429 (GCVE-0-2026-105429)
Vulnerability from cvelistv5 – Published: 2026-10-14 04:33 – Updated: 2026-10-14 04:33
VLAI
EPSS
VEX
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
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/netbirdio/netbird/security/adv… | vendor-advisory |
| https://github.com/netbirdio/netbird/pull/6805 | patch |
| https://github.com/netbirdio/netbird/releases/tag… | release-notes |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"cpes": [
"cpe:2.3:a:netbird:netbird:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"client/ssh/config"
],
"packageName": "github.com/netbirdio/netbird",
"platforms": [
"Linux",
"macOS",
"Windows",
"FreeBSD"
],
"product": "NetBird",
"programFiles": [
"client/ssh/config/manager.go"
],
"repo": "https://github.com/netbirdio/netbird",
"vendor": "NetBird",
"versions": [
{
"lessThan": "0.74.7",
"status": "affected",
"version": "0.60.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Arjun Basnet from Securin"
}
],
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{
"lang": "en",
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}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
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"baseSeverity": "HIGH",
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],
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},
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