{"id":"UBUNTU-CVE-2026-101910","details":"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.","modified":"2026-09-29T23:41:35.205486494Z","published":"2026-09-29T00:00:00Z","upstream":["CVE-2026-101910"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-101910"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-101910"},{"type":"REPORT","url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc"},{"type":"REPORT","url":"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8"},{"type":"REPORT","url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1"}],"affected":[{"package":{"name":"node-ip-address","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-ip-address?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-ip-address","binary_version":"6.3.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"}},{"package":{"name":"node-ip-address","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-ip-address?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.0-1","8.1.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"8.1.0-2","binary_name":"node-ip-address"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"}},{"package":{"name":"node-ip-address","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-ip-address?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.1.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-ip-address","binary_version":"8.1.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"}},{"package":{"name":"node-ip-address","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-ip-address?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.1.0-2","8.1.0-3"],"ecosystem_specific":{"binaries":[{"binary_name":"node-ip-address","binary_version":"8.1.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-101910.json"}}],"schema_version":"1.9.0","severity":[{"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"}]}