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CVE-2026-45249

6.1 · MEDIUM

A cross-site scripting (XSS) vulnerability exists in Apache ECharts in the Lines series tooltip rendering logic.

Published May 25, 2026CWE-79EPSS 0.93%

Overview

CVE-2026-45249 is a medium-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refecharts.apache.org/en/option.html#series-linesRefecharts.apache.org/handbook/en/best-practices/security/#passing_raw_html_safelyGitHubgithub.com/apache/echarts/pull/21608Reflists.apache.org/thread/1g6xk7gd9vg1c6zyqqt2lnko10zomc3oRefwww.openwall.com/lists/oss-security/2026/05/23/4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45249?

CVE-2026-45249 is a medium-severity vulnerability. It was published on May 25, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-45249?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-45249?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-45249?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45249 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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