What’s Vulnerable › Vulnerabilities
CVE-2026-9752: GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-09 · updated 2026-07-23
- Weakness: CWE-476
Description
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 products
- MongoDB: from 7.0.0 before 7.0.35; from 8.0.0 before 8.0.24; from 8.2.0 before 8.2.10; from 8.3.0 before 8.3.3 — fixed in 7.0.35, 8.0.24, 8.2.10, 8.3.3
How to fix
Upgrade to a fixed version: MongoDB 7.0.35, 8.0.24, 8.2.10, 8.3.3. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-9752 or the next vulnerability affects your stack