GitHub Advisoryadvisory · npm

GHSA-jrc7-96c5-q579 MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip

CRITICAL Published 2026-09-08 Modified 2026-09-08 Official page ↗
Aliases
CVE-2026-85061
Ecosystem
npm
Packages
maplibre-gl
Severity
Critical
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Weaknesses
CWE-79
Reviewed
2026-09-08

Affected packages

• npm maplibre-gl: < 6.4.1 → fixed in 6.4.1

Description

Impact `DOM.sanitize()` in `src/util/dom.ts` iterated `elem.attributes` (a live `NamedNodeMap`) while calling `elem.removeAttribute()` in the same loop. Removing an attribute shifts subsequent attributes down by one index, causing the iterator to skip the adjacent attribute. An attacker can provide an HTML payload with consecutive dangerous attributes (such as ``). The first attribute is stripped while the second survives and executes upon insertion into `innerHTML` via the attribution control without requiring user interaction (zero-click XSS). Applications rendering untrusted/third-party style attribution strings or user-supplied custom attributions are impacted. Patches The issue has been resolved by creating a static snapshot of attributes using `Array.from(elem.attributes)` before iteration. Please upgrade to `maplibre-gl` version 6.4.1 (or latest). Workarounds Sanitizing the attribute field of a source before passing it down to maplibre

Related

Alias · CVE (1)

  • CVE-2026-85061 MapLibre GL JS is an interactive vector tile map library for web browsers. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References