CVE-2026-118249 json
Highcharts: series column construction writes to Object.prototype
published 2026-10-28 11 d ago modified 2026-10-29 10 d ago also GHSA-gfvx-2c2g-38wq , EUVD-2026-112363
- cvss
- 7.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
Highcharts JS is a JavaScript charting library based on SVG. From 13.0.0 until 13.1.0, Highcharts builds series data columns by using point option keys directly as column IDs. Own enumerable __proto__ and constructor keys from parsed point objects can therefore direct integer-indexed writes to Object.prototype or the Object constructor. The inherited values affect reads and for-in enumeration across the page and can disrupt rendering or alter consuming application behavior without user interaction beyond rendering the chart. This issue is fixed in 13.1.0.
Patch / fix
- npm highcharts 13.1.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 10 d ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L |
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | highcharts | >=13.0.0, <13.1.0 |
13.1.0 |
Affected products
- highcharts highcharts
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/highcharts/highcharts/pull/25321
web
-
github.com
/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205
web
-
github.com
/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq
web
-
github.com
/highcharts/highcharts/releases/tag/v13.1.0
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-118249
advisory
-
github.com
/highcharts/highcharts
package
Sources
- CVE List CVE-2026-118249
- GitHub Advisory GHSA-gfvx-2c2g-38wq
- NVD CVE-2026-118249
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.