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Vulnerabilities

Vulnerability · CVE-2026-118250

Highcharts: dotted series.keys paths write to Object.prototype

Published Oct 28, 2026 · Highcharts: dotted series.keys paths

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-2026-118250. EPSS is 0.36%. Act only if a listed version of Highcharts: dotted series.keys paths is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Highcharts: dotted series.keys paths).
  • 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.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.36%
Remediation
Not established
Affected products
npm highcharts

A dot-separated key path taken from series.keys is followed without filtering the individual segments. An attacker who controls series.keys and the matching point data can use a path such as proto .polluted to set arbitrary properties on Object.prototype. The resulting properties are visible to all JavaScript running in the page, not only to the chart. No user interaction is required beyond rendering the chart. The injected properties are inert until other …

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-2026-118250

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-2026-118250. EPSS is 0.36%. Act only if a listed version of Highcharts: dotted series.keys paths 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?

No weakness class is stored. EPSS 0.36%. 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 dot-separated key path taken from series.keys is followed without filtering the individual segments. An attacker who controls series.keys and the matching point data can use a path such as proto .polluted to set arbitrary properties on Object.prototype. The resulting properties are visible to all JavaScript running in the page, not only to the chart. No user interaction is required beyond render

Sources

  • CVE.orgVulnerability recordCVE-2026-118250

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118250

    30-day exploitation probability 0.36%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-118250

    A dot-separated key path taken from series.keys is followed without filtering the individual segments. An attacker who controls series.keys and the matching point data can use a path such as proto .polluted to set arbitrary properties on Object.prototype. The resulting properties are visible to all JavaScript running in the page, not only to the chart. No user interaction is required beyond render

    advisories.gitlab.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
  • CVE.orgOct 29, 2026