CVE-2026-45249Public exploitNetwork attack vector

Script execution via unescaped tooltip item name

Published May 25, 2026 · Updated May 25, 2026

Cross-site scripting in Apache ECharts before 6.1.0 allows context-dependent attackers to execute script through a Lines item name. LinesSeriesModel.formatTooltip passes each Lines item name as raw HTML to an innerHTML tooltip sink instead of routing the value through the markup builder's HTML encoding. Exploitation requires attacker-influenced chart data, the Lines series and tooltip, no custom tooltip.formatter, and display of the affected tooltip.

CVSS severity6.1
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Apache ECharts before 6.1.0 allows context-dependent attackers to execute script through a Lines item name. LinesSeriesModel.formatTooltip passes each Lines item name as raw HTML to an innerHTML tooltip sink instead of routing the value through the markup builder's HTML encoding. Exploitation requires attacker-influenced chart data, the Lines series and tooltip, no custom tooltip.formatter, and display of the affected tooltip.

The record

CVE
CVE-2026-45249
Published
May 25, 2026
Updated
May 25, 2026
Vendor
The Apache Software Foundation
Product
Apache ECharts
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache EChartsversion=0 <6.1.0

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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Technologies

Your stack

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Your stack

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