CVE-2026-85061 — MapLibre GL JS is an interactive vector tile map library for web browsers.¶
Key facts
CVE-2026-85061 is a Critical (10.0) vulnerability: MapLibre GL JS is an interactive vector tile map library for web browsers.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-85061 |
| Severity | Critical (10.0) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-85061/ |
Details¶
English | 한국어
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.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-85061 |
| Type | XSS |
| CVSS Score | 10.0 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-85061/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-85061
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
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
Generated by PoC Generator on 2026-09-04T07:15:11.55869884
Frequently asked questions¶
What is CVE-2026-85061?¶
CVE-2026-85061 is a Critical (10.0) vulnerability: MapLibre GL JS is an interactive vector tile map library for web browsers.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-85061?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-85061?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.