{"id":"CVE-2026-101910","published":"2026-09-28T18:17:20.710","lastModified":"2026-09-28T19:16:48.560","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":[]}],"exploitRefs":[{"url":"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":[]},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":[]}],"hasPoc":true,"ai":null}