High
collectl — security advisory
colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances before displaying it, allowing a local user on a monitored host to inject escape sequences into the terminal of an operator running colmux, via a crafted process name (argv[0]).
- Products
- collectl
- Affected versions
- 3.6.7-1, 3.6.9-1, 4.0.0-2, 4.0.4-1, 4.0.5-1, 4.3.1-1, 4.3.20.1-1, 4.3.20.1-2, 4.3.20.2-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-103431
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances before displaying it, allowing a local user on a monitored host to inject escape sequences into the terminal of an operator running colmux, via a crafted process name (argv[0]).
osv:UBUNTU-CVE-2026-103431
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
collectl
Fixed versions: Not specified
Complete source record
{
"id": "1b7a7c1ddf7ed088c468e9dca887314aabac64e9d8e66ec85fa52c6eceea3f06",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-103431",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-103431",
"summary": "colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances before displaying it, allowing a local user on a monitored host to inject escape sequences into the terminal of an operator running colmux, via a crafted process name (argv[0]).",
"evidence": "osv:UBUNTU-CVE-2026-103431",
"products": [
{
"name": {
"value": "collectl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.6.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.6.9-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.0.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "4.0.4-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.0.5-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.20.1-2",
"evidence": "/affected/6/versions"
},
{
"value": "4.3.20.2-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "collectl",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/7/versions"
},
{
"value": "4.3.20.1-1",
"evidence": "/affected/7/versions"
},
{
"value": "4.3.20.1-2",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-103431",
"aliases": [
"UBUNTU-CVE-2026-103431"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=trusty",
"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"3.6.7-1",
"3.6.9-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "3.6.9-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"4.0.0-2",
"4.0.4-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.0.4-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"4.0.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.0.5-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"4.3.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.3.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.3.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.3.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"4.3.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.3.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.3.20.1-2",
"4.3.20.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.3.20.2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "collectl",
"purl": "pkg:deb/ubuntu/collectl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.3.1-1",
"4.3.20.1-1",
"4.3.20.1-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103431.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "collectl",
"binary_version": "4.3.20.1-2"
}
]
}
}
],
"modified": "2026-10-17T12:57:58.426083854Z",
"provider": "osv",
"upstream": [
"CVE-2026-103431"
],
"references": [
"https://ubuntu.com/security/CVE-2026-103431",
"https://www.cve.org/CVERecord?id=CVE-2026-103431",
"https://bugzilla.redhat.com/show_bug.cgi?id=2543974",
"https://access.redhat.com/security/cve/CVE-2026-103431"
]
},
"related_cves": [
{
"value": "CVE-2026-103431",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357801,
"published_at": "2026-10-01T09:17:00+00:00"
}