CriticalFix available
incus, lxd — security advisory
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.
- Products
- incus, lxd
- Affected versions
- 5.0.2+git20231211.1364ae4-1, 5.0.2+git20231211.1364ae4-2, 5.0.2+git20231211.1364ae4-3, 5.0.2+git20231211.1364ae4-4, 5.0.2+git20231211.1364ae4-5, 5.0.2+git20231211.1364ae4-6, 5.0.2+git20231211.1364ae4-7, 5.0.2+git20231211.1364ae4-8, 5.0.2+git20231211.1364ae4-9, 5.0.2+git20231211.1364ae4-9+deb13u1, 5.0.2+git20231211.1364ae4-9+deb13u2, 5.0.2+git20231211.1364ae4-9+deb13u3, 5.0.2+git20231211.1364ae4-9+deb13u4, 5.0.2-5, 5.0.2-5+deb12u1, 5.0.2-5+deb12u2, 5.0.2-5+deb12u3, 5.0.2-5+deb12u4, 5.0.2-5+deb12u5, 5.0.2-5+deb12u6, 5.0.2-6, 6.0.4-2, 6.0.4-2+deb13u1, 6.0.4-2+deb13u1~bpo12+1, 6.0.4-2+deb13u2, 6.0.4-2+deb13u2~bpo12+1, 6.0.4-2+deb13u3, 6.0.4-2+deb13u3~bpo12+1, 6.0.4-2+deb13u4, 6.0.4-2+deb13u4~bpo12+1, 6.0.4-2+deb13u5, 6.0.4-2+deb13u5~bpo12+1, 6.0.4-2+deb13u6~bpo12+1, 6.0.4-3, 6.0.5-1, 6.0.5-2, 6.0.5-3, 6.0.5-4, 6.0.5-5, 6.0.5-6, 6.0.5-7, 6.0.5-8, 6.0.6-1, 6.0.6-2
- Fixed versions
- 5.0.2+git20231211.1364ae4-9+deb13u5, 6.0.4-2+deb13u6, 6.0.6-3
- CVEs
- CVE-2026-34178
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:36 UTC · Revision 2
Source evidence
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.
osv:DEBIAN-CVE-2026-34178
incus
Fixed versions: 6.0.4-2+deb13u6
incus
Fixed versions: 6.0.6-3
lxd
Fixed versions: Not specified
lxd
Fixed versions: 5.0.2+git20231211.1364ae4-9+deb13u5
Complete source record
{
"id": "9607310b928db52391133fc26e6171a05a739e8190ca5744c6b4b02965efbb69",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-34178",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-34178",
"summary": "In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.",
"evidence": "osv:DEBIAN-CVE-2026-34178",
"products": [
{
"name": {
"value": "incus",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.0.4-2+deb13u6",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "6.0.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u1~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u2~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u3",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u3~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u4",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u4~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u5",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u5~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u6~bpo12+1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "incus",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.0.6-3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "6.0.4-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.4-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-4",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-5",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-6",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-7",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-8",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.6-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "lxd",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.0.2+git20231211.1364ae4-1",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-2",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-3",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-4",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-6",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-7",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-8",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u1",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u2",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u3",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u4",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u6",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-6",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "lxd",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u5",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "5.0.2+git20231211.1364ae4-9",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u1",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u2",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u3",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u4",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-34178",
"aliases": [
"DEBIAN-CVE-2026-34178"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.4-2+deb13u6"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.0.4-2",
"6.0.4-2+deb13u1",
"6.0.4-2+deb13u1~bpo12+1",
"6.0.4-2+deb13u2",
"6.0.4-2+deb13u2~bpo12+1",
"6.0.4-2+deb13u3",
"6.0.4-2+deb13u3~bpo12+1",
"6.0.4-2+deb13u4",
"6.0.4-2+deb13u4~bpo12+1",
"6.0.4-2+deb13u5",
"6.0.4-2+deb13u5~bpo12+1",
"6.0.4-2+deb13u6~bpo12+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34178.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.6-3"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.0.4-2",
"6.0.4-3",
"6.0.5-1",
"6.0.5-2",
"6.0.5-3",
"6.0.5-4",
"6.0.5-5",
"6.0.5-6",
"6.0.5-7",
"6.0.5-8",
"6.0.6-1",
"6.0.6-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34178.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lxd",
"purl": "pkg:deb/debian/lxd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.0.2+git20231211.1364ae4-1",
"5.0.2+git20231211.1364ae4-2",
"5.0.2+git20231211.1364ae4-3",
"5.0.2+git20231211.1364ae4-4",
"5.0.2+git20231211.1364ae4-5",
"5.0.2+git20231211.1364ae4-6",
"5.0.2+git20231211.1364ae4-7",
"5.0.2+git20231211.1364ae4-8",
"5.0.2+git20231211.1364ae4-9",
"5.0.2-5",
"5.0.2-5+deb12u1",
"5.0.2-5+deb12u2",
"5.0.2-5+deb12u3",
"5.0.2-5+deb12u4",
"5.0.2-5+deb12u5",
"5.0.2-5+deb12u6",
"5.0.2-6"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34178.json"
},
"ecosystem_specific": {
"urgency": "end-of-life"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0.2+git20231211.1364ae4-9+deb13u5"
}
]
}
],
"package": {
"name": "lxd",
"purl": "pkg:deb/debian/lxd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.0.2+git20231211.1364ae4-9",
"5.0.2+git20231211.1364ae4-9+deb13u1",
"5.0.2+git20231211.1364ae4-9+deb13u2",
"5.0.2+git20231211.1364ae4-9+deb13u3",
"5.0.2+git20231211.1364ae4-9+deb13u4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34178.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:31.965101561Z",
"provider": "osv",
"upstream": [
"CVE-2026-34178"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-34178"
]
},
"related_cves": [
{
"value": "CVE-2026-34178",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460872,
"published_at": "2026-04-09T10:16:21.82+00:00"
}