{"id":"CVE-2026-101912","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 10.7.1, the isInSubnet and isHostInSubnet methods in src/common.ts compare masked binary strings without validating that both operands u…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-697","CWE-843","CWE-1024"],"vendor":"beaugunderson","product":"ip-address","affected":["ip-address < 10.7.1"],"patched":["ip-address 10.7.1"],"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-2026-101912","references":[{"url":"https://github.com/beaugunderson/ip-address/commit/1343629d57fea413644a5c9d41ff1e59619f3f28","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/releases/tag/v10.7.1","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcv","label":"security-advisories@github.com"},{"url":"https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcv","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101912.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-101912"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542601"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101912"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101912"},{"url":"https://github.com/advisories/GHSA-j6r3-76f7-8jcv"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","ghsa","npm"],"epss":0.0037,"epssPercentile":0.30802,"aliases":["GHSA-j6r3-76f7-8jcv"],"ecosystem":"npm","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-28T19:13:19.402733Z"},"cvssSource":"cna","scores":{"cna":6.3,"vendor":5.3},"ingestedAt":"2026-09-28T18:17:54.309Z","slug":"CVE-2026-101912","body":"## Overview\n\nip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the isInSubnet and isHostInSubnet methods in src/common.ts compare masked binary strings without validating that both operands use the same IP family. A cross-family containment check whose leading address bits match makes the masked strings compare equal even though IPv4 and IPv6 do not share an address space. An allowlist or denylist decision can therefore classify an address outside the intended range as contained. This issue is fixed in version 10.7.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-101912)\n\nAffected packages:\n\n- `ip-address <= 10.7.0`\n\nPatched in:\n\n- `ip-address 10.7.1`\n\nSource: https://github.com/advisories/GHSA-j6r3-76f7-8jcv\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-2026-101912.json)","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":34.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":212128,"id":"CVE-2026-101912","ts":1790626844001,"field":"exploit_available","old":"false","new":"true"}]}