Cross-Site Scripting Vulnerability in AWS Amplify by Amazon
CVE-2026-121652

4.8MEDIUM

Key Information:

Vendor

Aws

Status
Maplibre-gl-js-amplify
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121652?

A cross-site scripting (XSS) vulnerability exists in the AWS Amplify maplibre-gl-js-amplify package prior to version 4.0.3. This flaw allows authenticated remote users to inject arbitrary web scripts or HTML into the application through certain properties in GeoJSON feature data used by popupRender, including title, address, and place_name, as well as geofenceId values in AmplifyGeofenceControl. To safeguard against such an exploitation, it is crucial for users to upgrade to version 4.0.3 or later.

Affected Version(s)

maplibre-gl-js-amplify 0 < 4.0.3

References

https://github.com/aws-amplify/maplibre-gl-js-amplify/rel...
release-notespatch
https://github.com/aws-amplify/maplibre-gl-js-amplify/sec...
third-party-advisory
https://aws.amazon.com/security/security-bulletins/2026-1...
vendor-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.