Vulnerabilities in pkg:npm/echarts

PACKAGE
Advisory Identifier: GHSA-fgmj-fm8m-jvvx
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Advisory Summary

CVE-2026-45249 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Echarts libraries in the npm ecosystem. The issue involves apache echarts has a cross-site scripting (xss) vulnerability. Remediation is available by upgrading affected packages to version 6.1.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/echarts

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/echarts. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-fgmj-fm8m-jvvx CVE-2026-45249 MODERATE Apache ECharts has a cross-site scripting (XSS) vulnerability

CVE-2026-45249 at a Glance

CVE Identifier CVE-2026-45249
GHSA Identifier GHSA-fgmj-fm8m-jvvx
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Echarts
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-45249

To remediate this vulnerability, upgrade all affected Echarts dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

echarts fixed: 6.1.0 
npm install echarts@6.1.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls echarts

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-45249, inspect your project dependencies using npm:

npm ls echarts

Analyze the terminal output to locate any version of Echarts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.1.0), your application is affected.

Note: The npm ls echarts command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Echarts, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A cross-site scripting (XSS) vulnerability exists in Apache ECharts in the Lines series tooltip rendering logic. This issue affects Apache ECharts: from before 6.1.0. In versions prior to 6.1.0, if both Lines series and tooltip are used, and no user-specified tooltip.formatter is provided, and series.data[i].name is specified, raw HTML string series.data[i].name can be rendered through innerHTML sink into tooltip content. Although tooltip is allowed to accept user-provided raw HTML via a custom tooltip.formatter, the built-in tooltip formatters conventionally perform HTML escaping automatically. This case breaks that convention and may unexpectedly lead to script execution when tooltips are displayed. Users are recommended to upgrade to version 6.1.0 if using the Lines series in this way, which fixes the issue.

CVE-2026-45249 Affected Echarts Versions

1 component(s)
Fixed Versions:
6.1.0
Product / Package Ecosystem Affected Versions Fixed Version
echarts
npm/echarts
npm
< 6.1.0
6.1.0

References

NVD — CVE-2026-45249 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45249
Echarts Source Repository REPOSITORY
https://github.com/apache/echarts/pull/21608
Security Fix Commit FIX COMMIT
https://github.com/apache/echarts/commit/1e39b00eedda0e4a0b048e099c0e13ce7149d90f
Echarts Security Information SECURITY
https://echarts.apache.org/en/option.html#series-lines
Echarts Security Information SECURITY
https://echarts.apache.org/handbook/en/best-practices/security/#passing_raw_html_safely
Echarts Source Repository REPOSITORY
https://github.com/apache/echarts
lists.apache.org/thread/1g6xk7gd9vg1... WEB
https://lists.apache.org/thread/1g6xk7gd9vg1c6zyqqt2lnko10zomc3o
Echarts Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/23/4

Frequently Asked Questions

What is CVE-2026-45249?
CVE-2026-45249 is a security vulnerability in Echarts involving Apache ECharts has a cross-site scripting (XSS) vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Echarts versions are affected?
Affected versions include releases prior to 6.1.0 across affected packages: echarts.
What version fixes CVE-2026-45249?
Upgrading to 6.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is echarts affected?
Yes, echarts is affected in releases prior to 6.1.0. Upgrade your dependency to 6.1.0 or later.
What is the CVSS score of CVE-2026-45249?
CVE-2026-45249 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-45249?
CVE-2026-45249 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-45249?
Run the dependency tree command: 'npm ls echarts'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fgmj-fm8m-jvvx",
  "modified" : "2026-06-30T16:55:25Z",
  "published" : "2026-05-26T13:30:40Z",
  "aliases" : [ "CVE-2026-45249" ],
  "summary" : "Apache ECharts has a cross-site scripting (XSS) vulnerability",
  "details" : "A cross-site scripting (XSS) vulnerability exists in Apache ECharts in the Lines series tooltip rendering logic.\n\nThis issue affects Apache ECharts: from before 6.1.0.\n\nIn versions prior to 6.1.0, if both Lines series and tooltip are used, and no user-specified tooltip.formatter is provided, and series.data[i].name is specified, raw HTML string series.data[i].name can be rendered through innerHTML sink into tooltip content. Although tooltip is allowed to accept user-provided raw HTML via a custom tooltip.formatter, the built-in tooltip formatters conventionally perform HTML escaping automatically. This case breaks that convention and may unexpectedly lead to script execution when tooltips are displayed.\n\n\nUsers are recommended to upgrade to version 6.1.0 if using the Lines series in this way, which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "echarts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45249"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/echarts/pull/21608"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/echarts/commit/1e39b00eedda0e4a0b048e099c0e13ce7149d90f"
  }, {
    "type" : "WEB",
    "url" : "https://echarts.apache.org/en/option.html#series-lines"
  }, {
    "type" : "WEB",
    "url" : "https://echarts.apache.org/handbook/en/best-practices/security/#passing_raw_html_safely"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/echarts"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/1g6xk7gd9vg1c6zyqqt2lnko10zomc3o"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/05/23/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-30T16:55:25Z",
    "nvd_published_at" : "2026-05-25T08:16:24Z"
  }
}