What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-09
• Weakness: CWE-79

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.

Affected products

• maplibre-gl-js: before 6.4.1

References

• https://github.com/maplibre/maplibre-gl-js/commit/1da69f3cd913a39fa948708e01478663bf48bc27
• https://github.com/maplibre/maplibre-gl-js/pull/8189
• https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.4.1
• https://github.com/maplibre/maplibre-gl-js/security/advisories/GHSA-jrc7-96c5-q579

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