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Vulnerabilities

Vulnerability · CVE-2026-118242

Highcharts Grid: custom icon definition objects written with raw on

Published Oct 28, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118242. EPSS is 0.30%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Vendor / distro source
Affected products
npm @highcharts

A custom icon supplied under rendering.icons as an icon definition object is built by creating an SVG path for each of its child entries and setting every key of that entry as an attribute of the path, without filtering the attribute names; only the string form of the option is passed through the markup allow-list. An attacker who controls the Grid configuration can therefore supply child entries whose keys name …

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm @highchartsversion unspecified

How to fix CVE-2026-118242

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118242. EPSS is 0.30%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · GitLab Advisory Database

    Detected

    A custom icon supplied under rendering.icons as an icon definition object is built by creating an SVG path for each of its child entries and setting every key of that entry as an attribute of the path, without filtering the attribute names; only the string form of the option is passed through the markup allow-list. An attacker who controls the Grid configuration can therefore supply child entries

Sources

  • CVE.orgVulnerability recordCVE-2026-118242

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118242

    30-day exploitation probability 0.30%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-118242

    A custom icon supplied under rendering.icons as an icon definition object is built by creating an SVG path for each of its child entries and setting every key of that entry as an attribute of the path, without filtering the attribute names; only the string form of the option is passed through the markup allow-list. An attacker who controls the Grid configuration can therefore supply child entries

    advisories.gitlab.com
  • Red Hat Security DataVendor advisoryCVE-2026-118242

    highcharts: highcharts: Cross-site scripting via unsanitized grid icon attributes

    access.redhat.com

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • GitLab Advisory DatabaseOct 30, 2026
  • Red Hat Security DataOct 30, 2026
  • CVE.orgOct 29, 2026