UBUNTU-CVE-2026-75975

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Source
https://ubuntu.com/security/CVE-2026-75975
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-75975
Upstream
Published
2026-08-24T10:16:00Z
Modified
2026-09-02T19:36:34Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not validate the complete IPv6 grammar, so invalid trailing text in an authority can be silently discarded and a malformed attacker-controlled host is turned into a different valid IPv6 destination. For example, a bracketed literal with invalid trailing characters is normalized to the unspecified address, which a Node HTTP client then connects to a local service over loopback, and other malformed literals collapse to private-range addresses. No error is set on the parsed result, so an application checking the error field cannot detect the rewrite. An application that normalizes untrusted URLs before outbound requests, redirects, proxy routing, or address-policy enforcement can be redirected to a local or private IPv6 target, giving a server-side request forgery and address-policy bypass primitive. The affected versions are 2.3.1 up to but not including 2.4.5, 3.0.0 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which validate bracketed IP literals against the full grammar and mark malformed literals as authority errors. Users should upgrade to a patched version.

References

Affected packages

Ubuntu:18.04:LTS / node-ajv

Package

Name
node-ajv
Purl
pkg:deb/ubuntu/node-ajv?arch=source&distro=bionic

Affected ranges

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

Affected versions

5.*
5.0.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-ajv",
            "binary_version": "5.0.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json"

Ubuntu:20.04:LTS / node-ajv

Package

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

Affected ranges

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

Affected versions

6.*
6.10.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-ajv",
            "binary_version": "6.10.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json"

Ubuntu:22.04:LTS / node-ajv

Package

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

Affected ranges

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

Affected versions

6.*
6.12.6-2
6.12.6-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-ajv",
            "binary_version": "6.12.6-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json"

Ubuntu:24.04:LTS / node-ajv

Package

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

Affected ranges

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

Affected versions

6.*
6.12.6-3
8.*
8.12.0~ds+~2.1.1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-ajv",
            "binary_version": "8.12.0~ds+~2.1.1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json"

Ubuntu:26.04:LTS / node-ajv

Package

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

Affected ranges

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

Affected versions

8.*
8.12.0~ds+~2.1.1-5
8.17.1~ds+~3.0.1+~3.1.0-2
8.17.1~ds+~3.0.1+~3.1.0-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-ajv",
            "binary_version": "8.17.1~ds+~3.0.1+~3.1.0-4build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75975.json"