CVE-2026-42338
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk38th percentile - higher than 38% of all known CVEs
Summary
The ip-address library before version 10.1.1 does not HTML-escape attacker-controlled content in Address6.group() and Address6.link() methods and in AddressError.parseMessage error messages. An application that passes untrusted input to Address6 and renders the output as HTML is vulnerable to XSS attacks.
Risk Assessment
An attacker can inject malicious JavaScript into a web page, potentially leading to session hijacking, account takeover, or data leakage.
Recommendation
Update the ip-address library to version 10.1.1 or later immediately. If updating is not possible, avoid rendering the output of Address6.group() and Address6.link() as HTML.
Original NVD description (English source)
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.