Critical
Update of type field in restricted TLS certificate allows privilege escalation to cluster admin
Type: advisorySources: OSV
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-34179
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 14:05 UTC · Revision 1
Source evidence
Update of type field in restricted TLS certificate allows privilege escalation to cluster admin
core-osv · Original sourcePublished 9 Apr 2026, 09:22 UTC
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
osv:CVE-2026-34179
Complete source record
{
"id": "a4b98494c124067463e2b4c7f2933f5c4bea6e22f74a1449aebcc9c88231438b",
"url": "https://osv.dev/vulnerability/CVE-2026-34179",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Update of type field in restricted TLS certificate allows privilege escalation to cluster admin",
"summary": "In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.",
"evidence": "osv:CVE-2026-34179",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-34179",
"aliases": [
"CVE-2026-34179",
"GHSA-c3h3-89qf-jqm5",
"GO-2026-5306"
],
"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": [
{
"repo": "https://github.com/canonical/lxd",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "7b1f0b6acefa288398ead8dda48b046d7b2795a3"
},
{
"fixed": "c5184be310b13a8be5d9a5f286bfa1c0c286716e"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "4.12.0"
},
{
"fixed": "5.0.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "5.1.0"
},
{
"fixed": "5.21.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
}
],
"versions": [
"lxd-5.17",
"lxd-5.16",
"lxd-5.15",
"lxd-5.14",
"lxd-5.13",
"lxd-5.12",
"lxd-5.11",
"lxd-5.0.2",
"lxd-5.10",
"lxd-5.9",
"lxd-5.8",
"lxd-5.7",
"lxd-5.6",
"lxd-5.5",
"lxd-5.0.1",
"lxd-5.4",
"lxd-5.3",
"lxd-5.2",
"lxd-5.1",
"lxd-5.0.0",
"lxd-4.24",
"lxd-4.23",
"lxd-4.22",
"lxd-4.21",
"lxd-4.20",
"lxd-4.19",
"lxd-4.18",
"lxd-4.17",
"lxd-4.16",
"lxd-4.15",
"lxd-4.14",
"lxd-4.13",
"lxd-4.12",
"lxd-4.11",
"lxd-4.10",
"lxd-4.9",
"lxd-4.8",
"lxd-4.7",
"lxd-4.6",
"lxd-4.5",
"lxd-4.4",
"lxd-4.3",
"lxd-4.2",
"lxd-4.1",
"lxd-4.0.0",
"lxd-3.23",
"lxd-3.22",
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"lxd-3.3",
"lxd-3.2",
"lxd-3.1",
"lxd-3.0.0",
"lxd-3.0.0.beta7",
"lxd-3.0.0.beta6",
"lxd-3.0.0.beta5",
"lxd-3.0.0.beta4",
"lxd-3.0.0.beta3",
"lxd-3.0.0.beta2",
"lxd-3.0.0.beta1",
"lxd-2.21",
"lxd-2.20",
"lxd-2.19",
"lxd-2.18",
"lxd-2.17",
"lxd-2.16",
"lxd-2.15",
"lxd-2.14",
"lxd-2.13",
"lxd-2.12",
"lxd-2.11",
"lxd-2.10.1",
"lxd-2.10",
"lxd-2.9.3",
"lxd-2.9.2",
"lxd-2.9.1",
"lxd-2.9",
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"lxd-2.7",
"lxd-2.6.2",
"lxd-2.6.1",
"lxd-2.6",
"lxd-2.5",
"lxd-2.4.1",
"lxd-2.4",
"lxd-2.3",
"lxd-2.2",
"lxd-2.1",
"lxd-2.0.0",
"lxd-2.0.0.rc9",
"lxd-2.0.0.rc8",
"lxd-2.0.0.rc7",
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"lxd-2.0.0.rc5",
"lxd-2.0.0.rc4",
"lxd-2.0.0.rc3",
"lxd-2.0.0.rc2",
"lxd-2.0.0.rc1",
"lxd-2.0.0.beta4",
"lxd-2.0.0.beta3",
"lxd-2.0.0.beta2",
"lxd-2.0.0.beta1",
"lxd-0.27",
"lxd-0.26",
"lxd-0.25",
"lxd-0.24",
"lxd-0.23",
"lxd-0.22",
"lxd-0.21",
"lxd-0.20",
"lxd-0.19",
"lxd-0.18",
"lxd-0.17",
"lxd-0.16",
"lxd-0.15",
"lxd-0.14",
"lxd-0.13",
"lxd-0.12",
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"lxd-0.10",
"lxd-0.9",
"lxd-0.8.1",
"lxd-0.8",
"lxd-0.7",
"lxd-0.6",
"lxd-0.5",
"lxd-0.4",
"lxd-0.3",
"lxd-0.2",
"lxd-0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34179.json"
}
}
],
"modified": "2026-10-28T02:30:29.414648816Z",
"provider": "osv",
"references": [
"https://github.com/canonical",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34179.json",
"https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34179",
"https://github.com/canonical/lxd/pull/17936",
"https://github.com/canonical/lxd"
],
"provider_metadata": {
"cwe_ids": [
"CWE-915"
],
"cna_assigner": "canonical",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.8.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34179.json"
}
},
"related_cves": [
{
"value": "CVE-2026-34179",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 496221,
"published_at": "2026-04-09T09:22:14.693+00:00"
}