{"id":"CVE-2026-101910","revision":"b4d56285682843e989b39ff5fe477993","records":[{"revision":"b4d56285682843e989b39ff5fe477993","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101910","aliases":[],"title":"ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass","description":"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.","state":0,"publishedAt":"2026-09-28T17:45:27.675+00:00","modifiedAt":"2026-09-28T18:12:34.05+00:00","affected":[{"ecosystem":"Vendor product","name":"ip-address","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"beaugunderson\",\n                    \"product\": \"ip-address\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 10.2.0, < 10.5.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.9,"severity":"MEDIUM"}],"references":["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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101910","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101910","identifiers":["CVE-2026-101910"]},"retained":false,"historicalAffected":[]}],"coverage":[]}