What’s Vulnerable › Vulnerabilities

CVE-2026-45249: Apache ECharts: XSS in Lines series tooltip rendering

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-25 · updated 2026-07-23
• Weakness: CWE-79

Description

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.

Affected products

• Apache Software Foundation Apache ECharts: before 6.1.0 — fixed in 6.1.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache ECharts 6.1.0. Check the vendor advisory for mitigations.

References

• https://echarts.apache.org/en/option.html#series-lines
• https://echarts.apache.org/handbook/en/best-practices/security/#passing_raw_html_safely
• https://github.com/apache/echarts/pull/21608
• https://lists.apache.org/thread/1g6xk7gd9vg1c6zyqqt2lnko10zomc3o
• http://www.openwall.com/lists/oss-security/2026/05/23/4

Get alerted when CVE-2026-45249 or the next vulnerability affects your stack