UBUNTU-CVE-2026-73646

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-73646
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73646.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-73646
Upstream
Published
2026-08-17T16:17:00Z
Modified
2026-08-19T13:34:34.553008720Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.18, lib/previous-map.js loadMap() passes attacker-controlled sourceMappingURL values to join(dirname(opts.from), annotation), and loadFile() permits traversed or absolute .map paths, allowing untrusted CSS processed without map: false to disclose sourcesContent from arbitrary reachable .map files through result.map. This issue is fixed in version 8.5.18.

References

Affected packages

Ubuntu:20.04:LTS / node-postcss

Package

Name
node-postcss
Purl
pkg:deb/ubuntu/node-postcss?arch=source&distro=focal

Affected ranges

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

Affected versions

6.*
6.0.23-1
6.0.23-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-postcss",
            "binary_version": "6.0.23-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73646.json"

Ubuntu:22.04:LTS / node-postcss

Package

Name
node-postcss
Purl
pkg:deb/ubuntu/node-postcss?arch=source&distro=jammy

Affected ranges

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

Affected versions

8.*
8.2.1+~cs5.3.23-8
8.4.5+~cs7.1.51-2
8.4.6+~cs7.3.21-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-postcss",
            "binary_version": "8.4.6+~cs7.3.21-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73646.json"

Ubuntu:24.04:LTS / node-postcss

Package

Name
node-postcss
Purl
pkg:deb/ubuntu/node-postcss?arch=source&distro=noble

Affected ranges

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

Affected versions

8.*
8.4.20+~cs8.0.23-1
8.4.31+~cs8.0.26-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-postcss",
            "binary_version": "8.4.31+~cs8.0.26-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73646.json"

Ubuntu:26.04:LTS / node-postcss

Package

Name
node-postcss
Purl
pkg:deb/ubuntu/node-postcss?arch=source&distro=resolute

Affected ranges

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

Affected versions

8.*
8.5.6+~cs9.3.28-1
8.5.8+~cs9.3.30-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-postcss",
            "binary_version": "8.5.8+~cs9.3.30-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73646.json"