Medium
node-ip-address — security advisory
ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. From 10.2.0 until 10.5.1, the Address6 isPrivate classifier in src/ipv6.ts does not recognize the NAT64 local-use range 64:ff9b:1::/48. Applications that combine isPrivate, isLoopback, and isLinkLocal for a trust-boundary decision can treat an internal IPv4 destination encoded through that range as external. Exploitation depends on a server network using an operator-selected NAT64 prefix within the local-use range. A successful bypass can cross the intended network trust boundary. This issue is fixed in version 10.5.1.
- Products
- node-ip-address
- Affected versions
- 10.2.0-2, 10.3.1-1, 10.4.0-1, 6.3.0-1, 6.4.0-1, 8.1.0-2, 8.1.0-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-101910
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:57 UTC · Revision 1
Source evidence
ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. From 10.2.0 until 10.5.1, the Address6 isPrivate classifier in src/ipv6.ts does not recognize the NAT64 local-use range 64:ff9b:1::/48. Applications that combine isPrivate, isLoopback, and isLinkLocal for a trust-boundary decision can treat an internal IPv4 destination encoded through that range as external. Exploitation depends on a server network using an operator-selected NAT64 prefix within the local-use range. A successful bypass can cross the intended network trust boundary. This issue is fixed in version 10.5.1.
osv:UBUNTU-CVE-2026-101910
node-ip-address
Fixed versions: Not specified
node-ip-address
Fixed versions: Not specified
node-ip-address
Fixed versions: Not specified
node-ip-address
Fixed versions: Not specified
node-ip-address
Fixed versions: Not specified
Complete source record
{
"id": "a047015eeac390da05261298b837e6cf09bbabd4806371763247096475eb1aa3",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-101910",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-101910",
"summary": "ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. From 10.2.0 until 10.5.1, the Address6 isPrivate classifier in src/ipv6.ts does not recognize the NAT64 local-use range 64:ff9b:1::/48. Applications that combine isPrivate, isLoopback, and isLinkLocal for a trust-boundary decision can treat an internal IPv4 destination encoded through that range as external. Exploitation depends on a server network using an operator-selected NAT64 prefix within the local-use range. A successful bypass can cross the intended network trust boundary. This issue is fixed in version 10.5.1.",
"evidence": "osv:UBUNTU-CVE-2026-101910",
"products": [
{
"name": {
"value": "node-ip-address",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.3.0-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "node-ip-address",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.4.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.1.0-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "node-ip-address",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1.0-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "node-ip-address",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1.0-3",
"evidence": "/affected/3/versions"
},
{
"value": "10.2.0-2",
"evidence": "/affected/3/versions"
},
{
"value": "10.3.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "10.4.0-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "node-ip-address",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1.0-2",
"evidence": "/affected/4/versions"
},
{
"value": "8.1.0-3",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-101910",
"aliases": [
"UBUNTU-CVE-2026-101910"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-ip-address",
"purl": "pkg:deb/ubuntu/node-ip-address?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"6.3.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ip-address",
"binary_version": "6.3.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-ip-address",
"purl": "pkg:deb/ubuntu/node-ip-address?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"6.4.0-1",
"8.1.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ip-address",
"binary_version": "8.1.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-ip-address",
"purl": "pkg:deb/ubuntu/node-ip-address?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"8.1.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ip-address",
"binary_version": "8.1.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-ip-address",
"purl": "pkg:deb/ubuntu/node-ip-address?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"8.1.0-3",
"10.2.0-2",
"10.3.1-1",
"10.4.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ip-address",
"binary_version": "10.4.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "node-ip-address",
"purl": "pkg:deb/ubuntu/node-ip-address?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"8.1.0-2",
"8.1.0-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ip-address",
"binary_version": "8.1.0-3"
}
]
}
}
],
"modified": "2026-10-17T12:57:56.061370971Z",
"provider": "osv",
"upstream": [
"CVE-2026-101910"
],
"references": [
"https://ubuntu.com/security/CVE-2026-101910",
"https://www.cve.org/CVERecord?id=CVE-2026-101910",
"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc",
"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8",
"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1"
]
},
"related_cves": [
{
"value": "CVE-2026-101910",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357742,
"published_at": "2026-09-28T18:17:00+00:00"
}