ubuntu-cve-2026-34179
Vulnerability from osv_ubuntu
Published
2026-04-09 10:16
Modified
2026-07-02 16:13
Summary
Details
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.
Severity
9.1 (Critical)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-lxc-incus-dev",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-agent",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-client",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-migrate",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
},
{
"binary_name": "incus-tools",
"binary_version": "6.0.0-1ubuntu0.3+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "incus",
"purl": "pkg:deb/ubuntu/incus@6.0.0-1ubuntu0.3+esm3?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.4-1ubuntu1",
"0.5.1-1",
"0.5.1-3",
"0.6-1",
"6.0.0-1",
"6.0.0-1ubuntu0.1",
"6.0.0-1ubuntu0.2",
"6.0.0-1ubuntu0.2+esm1",
"6.0.0-1ubuntu0.3",
"6.0.0-1ubuntu0.3+esm1",
"6.0.0-1ubuntu0.3+esm2",
"6.0.0-1ubuntu0.3+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-lxc-incus-dev",
"binary_version": "6.0.4-2"
},
{
"binary_name": "incus",
"binary_version": "6.0.4-2"
},
{
"binary_name": "incus-agent",
"binary_version": "6.0.4-2"
},
{
"binary_name": "incus-base",
"binary_version": "6.0.4-2"
},
{
"binary_name": "incus-client",
"binary_version": "6.0.4-2"
},
{
"binary_name": "incus-extra",
"binary_version": "6.0.4-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "incus",
"purl": "pkg:deb/ubuntu/incus@6.0.4-2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.3-4",
"6.0.4-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-lxc-incus-dev",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
},
{
"binary_name": "incus",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
},
{
"binary_name": "incus-agent",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
},
{
"binary_name": "incus-base",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
},
{
"binary_name": "incus-client",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
},
{
"binary_name": "incus-extra",
"binary_version": "6.0.5-8ubuntu0.26.04.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "incus",
"purl": "pkg:deb/ubuntu/incus@6.0.5-8ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.4-2",
"6.0.5-8",
"6.0.5-8ubuntu0.26.04.1~esm1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-34179",
"modified": "2026-07-02T16:13:28Z",
"published": "2026-04-09T10:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-34179"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-34179"
},
{
"type": "REPORT",
"url": "https://github.com/canonical/lxd/pull/17936"
},
{
"type": "REPORT",
"url": "https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-34179"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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