CVE-2026-42338

MEDIUM CVSS 4.0: 5.3 EPSS 0.51%
Updated Oct 26, 2026
Beaugunderson
Parameter Value
CVSS 5.3 (MEDIUM)
Affected Versions before 10.1.1
Fixed In 10.1.1
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Beaugunderson
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Beaugunderson Ip-Address
cpe:2.3:a:beaugunderson:ip-address:*:*:*:*:*:node.js:*:*
— 10.1.1

References 34

https://github.com/beaugunderson/ip-address/security/advisories/GHSA-v2v4-37r5-…
security-advisories@github.com
https://access.redhat.com/errata/RHSA-2026:33155
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https://access.redhat.com/errata/RHSA-2026:33160
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https://access.redhat.com/errata/RHSA-2026:33163
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https://access.redhat.com/errata/RHSA-2026:33173
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https://access.redhat.com/errata/RHSA-2026:33183
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https://access.redhat.com/errata/RHSA-2026:33574
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https://access.redhat.com/errata/RHSA-2026:34374
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https://access.redhat.com/errata/RHSA-2026:35841
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https://access.redhat.com/errata/RHSA-2026:35842
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https://access.redhat.com/errata/RHSA-2026:35891
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https://access.redhat.com/errata/RHSA-2026:35892
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https://access.redhat.com/errata/RHSA-2026:36754
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https://access.redhat.com/errata/RHSA-2026:36820
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https://access.redhat.com/errata/RHSA-2026:39246
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https://access.redhat.com/errata/RHSA-2026:39868
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https://access.redhat.com/errata/RHSA-2026:41928
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https://access.redhat.com/errata/RHSA-2026:41947
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https://access.redhat.com/security/cve/CVE-2026-42338
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https://bugzilla.redhat.com/show_bug.cgi?id=2476810
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https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42338.json
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:44267
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:44237
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https://access.redhat.com/errata/RHSA-2026:44263
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https://access.redhat.com/errata/RHSA-2026:51200
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https://access.redhat.com/errata/RHSA-2026:52399
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https://access.redhat.com/errata/RHSA-2026:56928
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:57590
0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:60520
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https://access.redhat.com/errata/RHSA-2026:62336
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https://access.redhat.com/errata/RHSA-2026:62335
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https://access.redhat.com/errata/RHSA-2026:66545
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