CVE-2026-42338

6.1 MEDIUM

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript

Published: 2026-05-12 · Last updated: 2026-05-19

Severity and scoring

CVSS: 6.1 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE: CWE-79

Affected products

Vendor	Product
beaugunderson	ip-address

Description

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.1.1, Address6.group() and Address6.link() do not HTML-escape attacker-controlled content before embedding it in the HTML strings they return, and AddressError.parseMessage (emitted by the Address6 constructor for invalid input) can contain unescaped attacker-controlled content in one branch. An application that (1) passes untrusted input to Address6 and (2) renders the output of these methods, or the thrown error's parseMessage, as HTML (e.g. via innerHTML) is vulnerable to cross-site scripting. This vulnerability is fixed in 10.1.1.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42338
[Vendor advisory]https://github.com/beaugunderson/ip-address/security/advisories/GHSA-v2v4-37r5-5v8g
[Vendor advisory]https://github.com/beaugunderson/ip-address/security/advisories/GHSA-v2v4-37r5-5v8g

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