CVE-2026-9752: GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation

Published Jun 9, 2026
·
Updated

An authorized user could trigger a server crash by running a query with a 2dsphere index on a field that stores a GeoJSON GeometryCollection containing a Polygon with a strict-winding CRS. Strict-winding polygons are intentionally unsupported for indexing, but the guard that rejects them does not inspect members of a GeometryCollection, allowing the unsafe path to be reached which ends with an ensuing null-pointer dereference.

Affected Software

1 affected component
MongoDB MongoDB Server

Event History

Jun 9, 2026
CVE Published
via MITRE·10:27 PM
Data Sourced
via MITRE·10:27 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-9752?

The severity of CVE-2026-9752 is rated as medium with a CVSS score of 6.5.

2

How do I fix CVE-2026-9752?

To fix CVE-2026-9752, ensure that strict-winding polygons are not used in 2dsphere index queries.

3

What type of attack does CVE-2026-9752 allow?

CVE-2026-9752 allows an authorized user to cause a server crash by executing specific queries on 2dsphere indexes.

4

Which software is affected by CVE-2026-9752?

CVE-2026-9752 affects MongoDB Server.

5

What is the impact of CVE-2026-9752 on the system?

The impact of CVE-2026-9752 is a potential server crash when handling specific queries with 2dsphere indexing.

Company

Resources

Contact

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CVE-2026-9752 - GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation - SecAlerts