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VulnerabilityPublished Updated

CVE-2026-42338: beaugunderson ip-address · Cross-site Scripting

Affects beaugunderson ip-addressSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 10.1.1 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.1.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade beaugunderson ip-address to 10.1.1.

Affected software

ProductAffectedFixed in
beaugundersonip-addressAffected
  • <10.1.1
Fixed in
  • 10.1.1
npmip-addresspkg:npm/ip-addressOther threatsAffected
  • <10.1.1
Fixed in
  • 10.1.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in ip-address version 10.1.1. Users should upgrade to version 10.1.1 or later to remediate this vulnerability. The vendor advisory notes that mitigation options other than upgrading may not meet security criteria. Applications should ensure that any output from Address6 methods or AddressError.parseMessage is properly escaped before rendering as HTML. Red Hat has released security updates including this fix in nodejs22 packages for Red Hat Enterprise Linux 10.0 Extended Update Support.

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.

References

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