CVE-2026-101912 (GCVE-0-2026-101912)
Vulnerability from cvelistv5
Published
2026-09-28 17:48
Modified
2026-09-28 19:13
Severity ?
6.3 (Medium) - 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 - Incorrect Comparison
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
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 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.
References
Impacted products
Vendor Product Version
beaugunderson ip-address Version: < 10.7.1
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