UBUNTU-CVE-2026-75926

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Source
https://ubuntu.com/security/CVE-2026-75926
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-75926
Upstream
Published
2026-08-18T16:18:00Z
Modified
2026-09-02T19:36:33Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Hugo 0.161.0 placed the Node asset pipelines behind the Node.js permission model so that code running through PostCSS, Babel, or TailwindCSS could not reach the file system outside the project directory. Hugo 0.162.0 added tailwindcss to the AllowChildProcess default in config/security/securityConfig.go, which makes nodePermissionArgs in common/hexec/exec.go append --allow-child-process whenever the tool being launched is named tailwindcss. TailwindCSS loads the site's tailwind.config.js through require at startup, so top-level code in that file executes inside the permitted Node process and can call child_process to spawn a shell. The spawned process is not a Node process and inherits none of the permission flags, so it runs with the full privileges of the account performing the build. Building a site whose theme, module, or starter template supplies the Tailwind configuration therefore yields arbitrary command execution rather than the confined file access the permission model was introduced to enforce. Hugo 0.165.0 removes tailwindcss from the default security.exec.allow list, so the tool is no longer launched under the default configuration.

References

Affected packages

Ubuntu:16.04:LTS
hugo

Package

Name
hugo
Purl
pkg:deb/ubuntu/hugo?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.15+git20160109.147.dd1d655-1
0.15+git20160109.147.dd1d655-2
0.15+git20160128.179.5def6d9-1
0.15+git20160206.203.ed23711-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-spf13-hugo-dev",
            "binary_version": "0.15+git20160206.203.ed23711-1"
        },
        {
            "binary_name": "hugo",
            "binary_version": "0.15+git20160206.203.ed23711-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"
Ubuntu:18.04:LTS
hugo

Package

Name
hugo
Purl
pkg:deb/ubuntu/hugo?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.25.1-2
0.26-1
0.35-1
0.37.1-1
0.38-1
0.39-1
0.40-1
0.40.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-gohugoio-hugo-dev",
            "binary_version": "0.40.1-1"
        },
        {
            "binary_name": "hugo",
            "binary_version": "0.40.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"
Ubuntu:20.04:LTS
hugo

Package

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

Affected ranges

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

Affected versions

0.*
0.57.2-1
0.58.3-1
0.59.1-1.1
0.68.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hugo",
            "binary_version": "0.68.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"
Ubuntu:22.04:LTS
hugo

Package

Name
hugo
Purl
pkg:deb/ubuntu/hugo?arch=source&distro=jammy

Affected ranges

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

Affected versions

0.*
0.80.0-6
0.89.4-2
0.90.0-1
0.90.1-1
0.91.0-1
0.91.2-1
0.92.0-1
0.92.1-1build1
0.92.2-1
0.92.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hugo",
            "binary_version": "0.92.2-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"
Ubuntu:26.04:LTS
hugo

Package

Name
hugo
Purl
pkg:deb/ubuntu/hugo?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.131.0-1
0.152.2-1
0.153.1-3
0.153.2-1
0.154.2-2
0.154.3-1
0.154.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hugo",
            "binary_version": "0.154.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"
Ubuntu:Pro:24.04:LTS
hugo

Package

Name
hugo
Purl
pkg:deb/ubuntu/hugo?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

0.*
0.113.0-3
0.119.0-2
0.120.3-1
0.120.4-1
0.121.2-1
0.122.0-1
0.123.7-1build1
0.123.7-1ubuntu0.1
0.123.7-1ubuntu0.2
0.123.7-1ubuntu0.2+esm1
0.123.7-1ubuntu0.3
0.123.7-1ubuntu0.3+esm1
0.123.7-1ubuntu0.3+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hugo",
            "binary_version": "0.123.7-1ubuntu0.3+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75926.json"