{"cve":"CVE-2026-101912","nvd":{"published":"2026-09-28T18:17:21.073","modified":"2026-09-30T19:57:08.043","status":"Deferred","description":"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 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.","cvss_v4":{"vector":"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","score":6.3},"cvss_v3":null,"cwes":["CWE-697","CWE-843"],"references":["https://github.com/beaugunderson/ip-address/commit/1343629d57fea413644a5c9d41ff1e59619f3f28","https://github.com/beaugunderson/ip-address/releases/tag/v10.7.1","https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcv","https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcv"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-101912","score":0.0037,"percentile":0.30699,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-j6r3-76f7-8jcv","url":"https://osv.dev/vulnerability/GHSA-j6r3-76f7-8jcv","summary":"ip-address: isInSubnet() and isHostInSubnet() compare addresses of different families as if they shared an address space, allowing an allowlist check to admit an address outside its range","modified":"2026-09-30T00:00:03.843448355Z","packages":[{"ecosystem":"npm","name":"ip-address","purl":"pkg:npm/ip-address","ranges":["<10.7.1"],"fixed":["10.7.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}