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CVE-2026-101910

CVE-2026-101910 · ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.9 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • ip-address

    Versions
    • >= 10.2.0, < 10.5.1: Affected

    No fix published

  • node-ip-address Debian:12

    Versions
    • 10.2.0-1
    • 10.2.0-2
    • 10.3.1-1
    • 10.4.0-1
    • 10.7.2-1
    • 8.1.0-2
    • 8.1.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Debian:13

    Versions
    • 10.2.0-1
    • 10.2.0-2
    • 10.3.1-1
    • 10.4.0-1
    • 10.7.2-1
    • 8.1.0-2
    • 8.1.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Debian:14

    Versions
    • 10.2.0-1
    • 10.2.0-2
    • 10.3.1-1
    • 10.4.0-1
    • 8.1.0-2
    • 8.1.0-3
    Affected ranges
    • ECOSYSTEM: < 10.7.2-1

    Update to 10.7.2-1

  • ip-address npm

    Affected ranges
    • SEMVER: ≥ 10.2.0, < 10.5.1

    Update to 10.5.1

  • node-ip-address Ubuntu:20.04:LTS

    Versions
    • 6.3.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Ubuntu:22.04:LTS

    Versions
    • 6.4.0-1
    • 8.1.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Ubuntu:24.04:LTS

    Versions
    • 8.1.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Ubuntu:26.10

    Versions
    • 8.1.0-3
    • 10.2.0-2
    • 10.3.1-1
    • 10.4.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ip-address Ubuntu:26.04:LTS

    Versions
    • 8.1.0-2
    • 8.1.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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