{"id":"CVE-2026-101913","title":"ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript","summary":"ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.5.1, the Address6 isLinkLocal method in src/ipv6.ts recognizes only fe80::/64 instead of the complete fe80::/10 IPv6 link-local range…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N","cwe":["CWE-697","CWE-918","CWE-184"],"vendor":"beaugunderson","product":"ip-address","affected":["ip-address < 10.5.1"],"patched":["ip-address 10.5.1"],"published":"2026-09-28","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:57:08.043","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101913","references":[{"url":"https://github.com/beaugunderson/ip-address/commit/d03e960c7cc3179ef25c8a44b4f94dd499625546","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-rpw4-54j3-4h4q","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-rpw4-54j3-4h4q","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101913"},{"url":"https://github.com/advisories/GHSA-rpw4-54j3-4h4q"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101913.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-101913"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542600"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101913"}],"tags":["nvd","cve.org","exploit-available","ghsa","npm","csaf","vex","red-hat"],"epss":0.00386,"epssPercentile":0.32481,"aliases":["GHSA-rpw4-54j3-4h4q"],"ecosystem":"npm","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T18:37:28.332844Z"},"cvssSource":"cna","scores":{"cna":6.3,"vendor":5.3},"ingestedAt":"2026-09-28T18:17:54.309Z","slug":"CVE-2026-101913","body":"## Overview\n\nip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.5.1, the Address6 isLinkLocal method in src/ipv6.ts recognizes only fe80::/64 instead of the complete fe80::/10 IPv6 link-local range. An attacker-controlled address elsewhere in fe80::/10 can therefore pass a trust-boundary check that relies on isLinkLocal. The same address is identified as link-local by getType and getScope, exposing the inconsistent classification. A successful bypass can reach an on-link host outside the intended trust boundary. This issue is fixed in version 10.5.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-101913)\n\nAffected packages:\n\n- `ip-address <= 10.5.0`\n\nPatched in:\n\n- `ip-address 10.5.1`\n\nSource: https://github.com/advisories/GHSA-rpw4-54j3-4h4q\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-28 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101913.json)","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":34.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":212112,"id":"CVE-2026-101913","ts":1790623195773,"field":"exploit_available","old":"false","new":"true"}]}