8.1

CVE-2026-42338: ip-address: XSS in Address6 HTML-emitting methods

Modified
AliasesUBUNTU-CVE-2026-42338DEBIAN-CVE-2026-42338CGA-247q-hwp3-mqq6
Published 12-05-2026Last modified 11-09-2026

Vulnerability summary

CVE-2026-42338 is a high (CVSS 8.1) vulnerability in beaugunderson ip-address. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.7% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 19 · Related 11
OPENSUSE-SU-2026:11121-1OPENSUSE-SU-2026:21058-1OPENSUSE-SU-2026:21236-1RHSA-2026:35841RHSA-2026:35842RHSA-2026:35891

Timeline

  1. 12-05-2026
    PublishedVulnerability first disclosed.
  2. 11-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

10 scores · 7 sources · 2 versions

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.51% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Ip Address

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard72 products
  • actions-runner< 2.334.0-r1
  • code-server< 4.112.0-r4
  • commercial-gitlab-rails-ee-19.1< 19.1.7-r3
  • commercial-gitlab-rails-ee-19.2< 19.2.7-r1
  • commercial-gitlab-rails-ee-19.3< 19.3.3-r1
Wolfi24 products
  • code-server< 4.112.0-r4
  • katib-earlystopping< 0.19.0-r31
  • katib-suggestion-goptuna-compatAll versions (No fix recorded)
  • katib-suggestion-hyperband< 0.19.0-r31
  • katib-suggestion-hyperopt< 0.19.0-r31 | < 0.19.0-r40
Beaugunderson1 product
Debian1 product
  • node-ip-addressAll versions (No fix recorded) | < 10.2.0-2
Npm1 product
  • ip-address< 10.1.1
Ubuntu1 product
  • node-ip-addressAll versions (No fix recorded)

6 vendors · 100 products

References

40 links
Show all 40 references