UBUNTU-CVE-2026-22028

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Source
https://ubuntu.com/security/CVE-2026-22028
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-22028
Upstream
Published
2026-01-08T15:15:00Z
Modified
2026-01-20T19:18:03.119086Z
Severity
  • 7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U CVSS Calculator
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Preact, a lightweight web development framework, JSON serialization protection to prevent Virtual DOM elements from being constructed from arbitrary JSON. A regression introduced in Preact 10.26.5 caused this protection to be softened. In applications where values from JSON payloads are assumed to be strings and passed unmodified to Preact as children, a specially-crafted JSON payload could be constructed that would be incorrectly treated as a valid VNode. When this chain of failures occurs it can result in HTML injection, which can allow arbitrary script execution if not mitigated by CSP or other means. Applications using affected Preact versions are vulnerable if they meet all of the following conditions: first, pass unmodified, unsanitized values from user-modifiable data sources (APIs, databases, local storage, etc.) directly into the render tree; second assume these values are strings but the data source could return actual JavaScript objects instead of JSON strings; and third, the data source either fails to perform type sanitization AND blindly stores/returns raw objects interchangeably with strings, OR is compromised (e.g., poisoned local storage, filesystem, or database). Versions 10.26.10, 10.27.3, and 10.28.2 patch the issue. The patch versions restore the previous strict equality checks that prevent JSON-parsed objects from being treated as valid VNodes. Other mitigations are available for those who cannot immediately upgrade. Validate input types, cast or validate network data, sanitize external data, and use Content Security Policy (CSP).

References

Affected packages

Ubuntu:18.04:LTS / node-preact

Package

Name
node-preact
Purl
pkg:deb/ubuntu/node-preact@8.2.5-1?arch=source&distro=bionic

Affected ranges

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

Affected versions

8.*
8.2.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.2.5-1",
            "binary_name": "node-preact"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json"

Ubuntu:20.04:LTS / node-preact

Package

Name
node-preact
Purl
pkg:deb/ubuntu/node-preact@8.2.5-1?arch=source&distro=focal

Affected ranges

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

Affected versions

8.*
8.2.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.2.5-1",
            "binary_name": "node-preact"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json"

Ubuntu:22.04:LTS / node-preact

Package

Name
node-preact
Purl
pkg:deb/ubuntu/node-preact@8.2.5-2?arch=source&distro=jammy

Affected ranges

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

Affected versions

8.*
8.2.5-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.2.5-2",
            "binary_name": "node-preact"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json"

Ubuntu:24.04:LTS / node-preact

Package

Name
node-preact
Purl
pkg:deb/ubuntu/node-preact@8.2.5-3?arch=source&distro=noble

Affected ranges

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

Affected versions

8.*
8.2.5-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.2.5-3",
            "binary_name": "node-preact"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json"

Ubuntu:25.10 / node-preact

Package

Name
node-preact
Purl
pkg:deb/ubuntu/node-preact@8.2.5-3?arch=source&distro=questing

Affected ranges

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

Affected versions

8.*
8.2.5-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.2.5-3",
            "binary_name": "node-preact"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-22028.json"