CriticalFix available
cockpit — security advisory
Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
- Products
- cockpit
- Affected versions
- 337-1, 338-1, 339-1, 340-1, 341.1-1, 342-1, 343-1, 345-1, 345-1~bpo13+1, 346-1, 346-1~bpo13+1, 348-1, 348-1~bpo13+1, 350-1, 350-1~bpo13+1, 352-1, 352-1~bpo13+1, 353.1-1, 353.1-1~bpo13+1, 354-1, 354-1~bpo13+1, 355-1, 355-1~bpo13+1, 356-1, 356-1~bpo13+1, 358-1, 358-1~bpo13+1, 360-1~bpo13+1
- Fixed versions
- 337-1+deb13u1, 360-1
- CVEs
- CVE-2026-4631
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:49 UTC · Revision 1
Source evidence
Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
osv:DEBIAN-CVE-2026-4631
cockpit
Fixed versions: 337-1+deb13u1
cockpit
Fixed versions: 360-1
Complete source record
{
"id": "528265b20c6bb62aeaaa1063ddfa62cf6e58fe5247537daa72edb6dca3397bae",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-4631",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-4631",
"summary": "Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.",
"evidence": "osv:DEBIAN-CVE-2026-4631",
"products": [
{
"name": {
"value": "cockpit",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "337-1+deb13u1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "337-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cockpit",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "360-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "337-1",
"evidence": "/affected/1/versions"
},
{
"value": "338-1",
"evidence": "/affected/1/versions"
},
{
"value": "339-1",
"evidence": "/affected/1/versions"
},
{
"value": "340-1",
"evidence": "/affected/1/versions"
},
{
"value": "341.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "342-1",
"evidence": "/affected/1/versions"
},
{
"value": "343-1",
"evidence": "/affected/1/versions"
},
{
"value": "345-1",
"evidence": "/affected/1/versions"
},
{
"value": "345-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "346-1",
"evidence": "/affected/1/versions"
},
{
"value": "346-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "348-1",
"evidence": "/affected/1/versions"
},
{
"value": "348-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "350-1",
"evidence": "/affected/1/versions"
},
{
"value": "350-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "352-1",
"evidence": "/affected/1/versions"
},
{
"value": "352-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "353.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "353.1-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "354-1",
"evidence": "/affected/1/versions"
},
{
"value": "354-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "355-1",
"evidence": "/affected/1/versions"
},
{
"value": "355-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "356-1",
"evidence": "/affected/1/versions"
},
{
"value": "356-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "358-1",
"evidence": "/affected/1/versions"
},
{
"value": "358-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "360-1~bpo13+1",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-4631",
"aliases": [
"DEBIAN-CVE-2026-4631"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "337-1+deb13u1"
}
]
}
],
"package": {
"name": "cockpit",
"purl": "pkg:deb/debian/cockpit?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"337-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4631.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "360-1"
}
]
}
],
"package": {
"name": "cockpit",
"purl": "pkg:deb/debian/cockpit?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"337-1",
"338-1",
"339-1",
"340-1",
"341.1-1",
"342-1",
"343-1",
"345-1",
"345-1~bpo13+1",
"346-1",
"346-1~bpo13+1",
"348-1",
"348-1~bpo13+1",
"350-1",
"350-1~bpo13+1",
"352-1",
"352-1~bpo13+1",
"353.1-1",
"353.1-1~bpo13+1",
"354-1",
"354-1~bpo13+1",
"355-1",
"355-1~bpo13+1",
"356-1",
"356-1~bpo13+1",
"358-1",
"358-1~bpo13+1",
"360-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4631.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:34.239991374Z",
"provider": "osv",
"upstream": [
"CVE-2026-4631"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-4631"
]
},
"related_cves": [
{
"value": "CVE-2026-4631",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461295,
"published_at": "2026-04-07T17:16:38.01+00:00"
}