UBUNTU-CVE-2026-16033

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Source
https://ubuntu.com/security/CVE-2026-16033
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16033.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-16033
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:13.588863934Z
Severity
  • 8.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A path traversal vulnerability in LXD allows an attacker to achieve arbitrary host file read or unconstrained file creation. When processing image metadata templates, LXD fails to properly sanitize or restrict template file paths from escaping the instance templates directory (specifically affecting virtual machine / QEMU driver execution paths). An attacker can exploit this flaw by providing a crafted image archive with malicious template directives containing path traversal sequences, causing LXD to access or write files outside the intended template directory on the host system.

References

Affected packages

Ubuntu:Pro:16.04:LTS / lxd

Package

Name
lxd
Purl
pkg:deb/ubuntu/lxd?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.20-0ubuntu4
0.21-0ubuntu3
0.21-0ubuntu5
0.22-0ubuntu1
0.22-0ubuntu2
0.23-0ubuntu1
0.23-0ubuntu2
0.23-0ubuntu3
0.24-0ubuntu2
0.24-0ubuntu3
0.24-0ubuntu4
0.25-0ubuntu1
0.26-0ubuntu2
0.26-0ubuntu3
0.27-0ubuntu1
0.27-0ubuntu2
2.*
2.0.0~beta1-0ubuntu3
2.0.0~beta1-0ubuntu4
2.0.0~beta2-0ubuntu1
2.0.0~beta2-0ubuntu2
2.0.0~beta3-0ubuntu1
2.0.0~beta3-0ubuntu2
2.0.0~beta3-0ubuntu3
2.0.0~beta3-0ubuntu4
2.0.0~beta4-0ubuntu1
2.0.0~beta4-0ubuntu2
2.0.0~beta4-0ubuntu3
2.0.0~beta4-0ubuntu4
2.0.0~beta4-0ubuntu5
2.0.0~beta4-0ubuntu6
2.0.0~beta4-0ubuntu7
2.0.0~rc1-0ubuntu1
2.0.0~rc1-0ubuntu2
2.0.0~rc1-0ubuntu3
2.0.0~rc2-0ubuntu2
2.0.0~rc2-0ubuntu3
2.0.0~rc3-0ubuntu1
2.0.0~rc3-0ubuntu2
2.0.0~rc3-0ubuntu3
2.0.0~rc3-0ubuntu4
2.0.0~rc4-0ubuntu1
2.0.0~rc5-0ubuntu1
2.0.0~rc6-0ubuntu1
2.0.0~rc6-0ubuntu2
2.0.0~rc7-0ubuntu1
2.0.0~rc7-0ubuntu2
2.0.0~rc8-0ubuntu1
2.0.0~rc8-0ubuntu2
2.0.0~rc8-0ubuntu3
2.0.0~rc8-0ubuntu5
2.0.0~rc8-0ubuntu6
2.0.0~rc8-0ubuntu7
2.0.0~rc9-0ubuntu2
2.0.0~rc9-0ubuntu3
2.0.0~rc9-0ubuntu4
2.0.0~rc9-0ubuntu5
2.0.0-0ubuntu1
2.0.0-0ubuntu2
2.0.0-0ubuntu3
2.0.0-0ubuntu4
2.0.1-0ubuntu1~16.04.1
2.0.2-0ubuntu1~16.04.1
2.0.3-0ubuntu1~ubuntu16.04.2
2.0.4-0ubuntu1~ubuntu16.04.1
2.0.5-0ubuntu1~ubuntu16.04.1
2.0.8-0ubuntu1~ubuntu16.04.1
2.0.8-0ubuntu1~ubuntu16.04.2
2.0.9-0ubuntu1~16.04.1
2.0.9-0ubuntu1~16.04.2
2.0.10-0ubuntu1~16.04.1
2.0.10-0ubuntu1~16.04.2
2.0.11-0ubuntu1~16.04.2
2.0.11-0ubuntu1~16.04.4
2.0.11-0ubuntu1~16.04.4+esm1
2.0.11-0ubuntu1~16.04.4+esm2
2.0.11-0ubuntu1~16.04.4+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm3",
            "binary_name": "golang-github-lxc-lxd-dev"
        },
        {
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm3",
            "binary_name": "lxc2"
        },
        {
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm3",
            "binary_name": "lxd"
        },
        {
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm3",
            "binary_name": "lxd-client"
        },
        {
            "binary_version": "2.0.11-0ubuntu1~16.04.4+esm3",
            "binary_name": "lxd-tools"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16033.json"

Ubuntu:Pro:18.04:LTS / lxd

Package

Name
lxd
Purl
pkg:deb/ubuntu/lxd?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.18-0ubuntu6
2.19-0ubuntu1
2.20-0ubuntu3
2.20-0ubuntu4
2.21-0ubuntu1
2.21-0ubuntu2
2.21-0ubuntu3
2.21-0ubuntu4
3.*
3.0.0~beta2-0ubuntu3
3.0.0~beta3-0ubuntu3
3.0.0~beta5-0ubuntu2
3.0.0~beta7-0ubuntu1
3.0.0-0ubuntu1
3.0.0-0ubuntu2
3.0.0-0ubuntu3
3.0.0-0ubuntu4
3.0.1-0ubuntu1~18.04.1
3.0.2-0ubuntu1~18.04.1
3.0.3-0ubuntu1~18.04.1
3.0.3-0ubuntu1~18.04.2
3.0.3-0ubuntu1~18.04.2+esm1
3.0.3-0ubuntu1~18.04.2+esm2
3.0.3-0ubuntu1~18.04.2+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm3",
            "binary_name": "lxd"
        },
        {
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm3",
            "binary_name": "lxd-client"
        },
        {
            "binary_version": "3.0.3-0ubuntu1~18.04.2+esm3",
            "binary_name": "lxd-tools"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16033.json"

Ubuntu:20.04:LTS / lxd

Package

Name
lxd
Purl
pkg:deb/ubuntu/lxd?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:0.*
1:0.7
1:0.8
1:0.9
1:0.10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:0.10",
            "binary_name": "lxd"
        },
        {
            "binary_version": "1:0.10",
            "binary_name": "lxd-client"
        },
        {
            "binary_version": "1:0.10",
            "binary_name": "lxd-tools"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16033.json"