# CVE-2026-121652: Stored cross-site scripting (XSS) in AWS Amplify maplibre-gl-js-amplify popup rendering

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

Cross-site scripting (XSS) issue in AWS Amplify maplibre-gl-js-amplify before 4.0.3 might allow remote authenticated users to inject arbitrary web script or HTML via the (1) title, (2) address, or (3) place_name property in GeoJSON feature data rendered by popupRender, or the (4) geofenceId value rendered in AmplifyGeofenceControl.



To remediate this issue, users should upgrade to 4.0.3 or later.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: AMZN) — https://github.com/aws-amplify/maplibre-gl-js-amplify/releases/tag/v4.0.3

## Affected products and versions

- AWS / maplibre-gl-js-amplify: ≥ 0; < 4.0.3 (affected, custom). Source: CNA: AMZN

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: CNA: AMZN

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: AMZN

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/aws-amplify/maplibre-gl-js-amplify/releases/tag/v4.0.3 (CNA: AMZN; release-notes, patch)

- https://github.com/aws-amplify/maplibre-gl-js-amplify/security/advisories/GHSA-34v3-xxqp-g5g9 (CNA: AMZN; third-party-advisory)

- https://aws.amazon.com/security/security-bulletins/2026-167-aws/ (CNA: AMZN; vendor-advisory)

## Provenance

- CNA: AMZN: https://www.cve.org/CVERecord?id=CVE-2026-121652; retrieved 2026-11-03; source updated 2026-11-03

Revision: 689e48888c1b9d06ad8a06214811bdabe9249ea3c15a7a99dd300c3d2904e89f

Canonical: https://y2.dev/cve/CVE-2026-121652

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