UBUNTU-CVE-2026-90711

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Source
https://ubuntu.com/security/CVE-2026-90711
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-90711
Upstream
Published
2026-09-15T07:16:00Z
Modified
2026-09-16T14:03:31Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of the correct ::ffff:10.0.0.0/104, is accepted without error but trusts every IPv4 address on the internet rather than the block it names. Because the socket peer then becomes trusted at hop 0, any unauthenticated client can supply an arbitrary X-Forwarded-For header and control the address the application reads, which defeats IP-based access control, rate limiting, geolocation, and audit logging. This is a fail-open regression introduced in version 1.1.0. The issue is fixed in proxy-addr 2.0.8, and users should upgrade to 2.0.8 or later. As a workaround, ensure any IPv4-mapped IPv6 trust subnet uses a prefix length of at least 97, or express the range in plain IPv4 notation.

References

Affected packages

Ubuntu:16.04:LTS
node-proxy-addr

Package

Name
node-proxy-addr
Purl
pkg:deb/ubuntu/node-proxy-addr?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.0.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "1.0.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"
Ubuntu:18.04:LTS
node-proxy-addr

Package

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

Affected ranges

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

Affected versions

1.*
1.0.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "1.0.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"
Ubuntu:20.04:LTS
node-proxy-addr

Package

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

Affected ranges

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

Affected versions

1.*
1.0.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "1.0.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"
Ubuntu:22.04:LTS
node-proxy-addr

Package

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

Affected ranges

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

Affected versions

2.*
2.0.6+~0.1.2-1
2.0.7+~cs2.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "2.0.7+~cs2.3.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"
Ubuntu:24.04:LTS
node-proxy-addr

Package

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

Affected ranges

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

Affected versions

2.*
2.0.7+~cs2.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "2.0.7+~cs2.3.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"
Ubuntu:26.04:LTS
node-proxy-addr

Package

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

Affected ranges

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

Affected versions

2.*
2.0.7+~cs2.3.0-1
2.0.7+~cs2.3.7-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-proxy-addr",
            "binary_version": "2.0.7+~cs2.3.7-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90711.json"