{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101910","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-28T15:55:37.907Z","datePublished":"2026-09-28T17:45:27.675Z","dateUpdated":"2026-09-28T18:12:34.050Z"},"containers":{"cna":{"title":"ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc"},{"name":"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8","tags":["x_refsource_MISC"],"url":"https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8"},{"name":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1","tags":["x_refsource_MISC"],"url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1"}],"affected":[{"vendor":"beaugunderson","product":"ip-address","versions":[{"version":">= 10.2.0, < 10.5.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-28T17:45:27.675Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-2vr4-cq9g-pvrc","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-28T18:12:11.522445Z","id":"CVE-2026-101910","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T18:12:34.050Z"}}]}}