Vulnerability · Published Sep 28, 2026 · Assigned by GitHub_M
CVE-2026-101913ip-address: Address6.isLinkLocal() recognizes fe80::/64 rather than fe80::/10, allowing SSRF and trust-boundary bypass to on-link hosts
Medium 6.3
In plain English
A medium-severity server-side request forgery in ip-address from beaugunderson. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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. 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-ip-address | no fix listed | DEBIAN-CVE-2026-101913 |
| Debian:13 | node-ip-address | no fix listed | DEBIAN-CVE-2026-101913 |
| Debian:14 | node-ip-address | 10.7.2-1 | DEBIAN-CVE-2026-101913 |
| Ubuntu:22.04:LTS | node-ip-address | no fix listed | UBUNTU-CVE-2026-101913 |
| Ubuntu:24.04:LTS | node-ip-address | no fix listed | UBUNTU-CVE-2026-101913 |
| Ubuntu:26.04:LTS | node-ip-address | no fix listed | UBUNTU-CVE-2026-101913 |
| Ubuntu:26.10 | node-ip-address | no fix listed | UBUNTU-CVE-2026-101913 |
| npm | ip-address | 10.5.1 | GHSA-rpw4-54j3-4h4q |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| beaugunderson | ip-address | < 10.5.1 |
Weakness: CWE-697, CWE-918 · Vector: 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