CVE-2026-42338
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
The ip-address library before version 10.1.1 does not HTML-escape attacker-controlled content before embedding it in returned HTML strings. An application passing untrusted input to Address6 and rendering the output as HTML is vulnerable to cross-site scripting.
Risk Assessment
The risk is the possibility of executing arbitrary JavaScript in the victim's browser, potentially leading to data theft or session hijacking.
Recommendation
It is recommended to update the ip-address library to version 10.1.1 or later.
Other vulnerabilities in ip-address
See all- CVE-2026-69198Medium
The ip-address library for JavaScript versions 10.1.1 through 10.2.2 contains a vulnerability where special-use classification methods (isLoopback, isPrivate, isLinkLocal, isCGNAT, isMulticast, isUnspecified, isBroadcast, isULA, getType) rely on isInSubnet, which returns false when the address's subnet mask is shorter than the reference range's mask. Appending a CIDR suffix like /0 causes all these methods to report an internal address as unremarkable, while correctForm() and address still return the real internal target. Applications using these checks for network trust-boundary decisions, such as SSRF filters, may treat an internal target as external and allow the request. Fixed in version 10.2.2.
- CVE-2026-69192High
ip-address is a JavaScript library for parsing and manipulating IPv4 and IPv6 addresses. Prior to 10.3.1, Address4 accepts an octet with a leading zero and decodes it as decimal, while the WHATWG URL host parser, inet_aton, and getaddrinfo decode a leading zero as octal. This causes a disagreement between the library and the network stack about which host a string names. For example, new Address4('012.0.0.1') reports correctForm() as 12.0.0.1 and isPrivate() as false, but fetch('http://012.0.0.1/') connects to 10.0.0.1.
- CVE-2026-54272Medium
The ip-address library in JavaScript versions 10.1.1 through 10.2.0 is vulnerable to SSRF through misclassification of IPv4-mapped/NAT64 IPv6 addresses. These addresses are incorrectly classified as Global unicast, bypassing isLoopback, isUnspecified, isMulticast, isLinkLocal, and isULA checks. For IPv4-mapped addresses, this is reachable on any dual-stack host; for NAT64, it requires a NAT64/DNS64 gateway.
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS