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CVE-2026-85061— MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip

Quick assessment

Affected
maplibre maplibre-gl-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MapLibre GL JS是MapLibre组织的一个基于WebGL的地图渲染库。 MapLibre GL JS 6.4.1之前版本存在跨站脚本漏洞，该漏洞源于src/util/dom.ts中的DOM.sanitize()在移除属性时遍历活动NamedNodeMap，导致索引偏移并跳过相邻的危险属性，容易受到跨站脚本攻击。攻击者可借助不受信任的第三方样式归属字符串或自定义归属提供连续的危险属性，使onload、ontoggle等属性绕过清理并在归因控件插入innerHTML时执行。

CVSS 10.0 · Critical EPSS 0.52% · P45

Possible ATT&CK Techniques 1 AI

T1218 · System Binary Proxy Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
maplibre maplibre-gl-js < 6.4.1 affected
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I. Basic Information for CVE-2026-85061

Vulnerability Information
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Vulnerability Title
MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip
Source: CVE Program / CVE List V5
Vulnerability Description
MapLibre GL JS is an interactive vector tile map library for web browsers. Prior to 6.4.1, DOM.sanitize() in src/util/dom.ts iterates elem.attributes as a live NamedNodeMap while removeAttributes() removes attributes from the same collection, shifting indexes and skipping an adjacent dangerous attribute. An attacker who controls untrusted third-party style attribution strings or user-supplied custom attributions can supply consecutive dangerous attributes, causing an attribute such as onload or ontoggle to survive sanitization and execute when the attribution control inserts the content into innerHTML. A victim must render the affected map content for the script to execute. This issue is fixed in version 6.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
MapLibre GL JS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MapLibre GL JS是MapLibre组织的一个基于WebGL的地图渲染库。 MapLibre GL JS 6.4.1之前版本存在跨站脚本漏洞，该漏洞源于src/util/dom.ts中的DOM.sanitize()在移除属性时遍历活动NamedNodeMap，导致索引偏移并跳过相邻的危险属性，容易受到跨站脚本攻击。攻击者可借助不受信任的第三方样式归属字符串或自定义归属提供连续的危险属性，使onload、ontoggle等属性绕过清理并在归因控件插入innerHTML时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
maplibre maplibre-gl-js < 6.4.1 -

II. Public POCs for CVE-2026-85061

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III. Intelligence Information for CVE-2026-85061

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Patches & Fixes for CVE-2026-85061 (2)

Vendor Advisories for CVE-2026-85061 (1)

Vendor Pages for CVE-2026-85061 (1)

IV. Related Vulnerabilities

Same vendor: maplibre
Same weakness: CWE-79