# CVE-2026-58505: geojson-vt: Uncontrolled Recursion in Nested GeoJSON GeometryCollection

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

geojson-vt is a JavaScript library for slicing GeoJSON data into vector tiles on the fly, primarily designed to enable rendering and interacting with large geospatial datasets on the browser side (without a server). Prior to version 6.1.1, @maplibre/geojson-vt contains an uncontrolled recursion vulnerability in its GeoJSON conversion logic. When a GeoJSONVT instance is constructed with a deeply nested GeometryCollection object, the mutually recursive functions featureToInternal and convertGeometryCollection in src/convert.ts exhaust the Node.js call stack, causing an unhandled RangeError: Maximum call stack size exceeded that terminates the process. Because the library is widely used in server-side tile services that accept GeoJSON over the network, a remote unauthenticated attacker can trigger a denial-of-service by sending a single crafted payload. No authentication is required, and no non-default library options are needed. This issue has been patched in version 6.1.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- maplibre / geojson-vt: < 6.1.1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-674

## Exploit evidence

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

## References

- https://github.com/maplibre/geojson-vt/security/advisories/GHSA-75qh-632x-j5pr (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/maplibre/geojson-vt/pull/156 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/maplibre/geojson-vt/commit/cb85688270d80894ce377969c75e631fe4b04c82 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/maplibre/geojson-vt/releases/tag/v6.1.1 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-58505; retrieved 2026-11-11; source updated 2026-11-11

Revision: 27b997872aafd708e623d91a19f88e86e2a8db66d1c8670d193aa156826d3ae3

Canonical: https://y2.dev/cve/CVE-2026-58505

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