What’s Vulnerable › Vulnerabilities
CVE-2026-82055: Null Pointer Dereference in MongoDB Server 2dsphere Index Key Generation Leads to Denial of Service
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-08 · updated 2026-09-16
- Weakness: CWE-476
Description
A security issue exists in MongoDB's 2dsphere index key generation that can cause a server crash due to a null pointer dereference. When a specially crafted GeoJSON document is inserted into a collection with a 2dsphere index, an inconsistency in geometry parsing can leave an internal object in an invalid, partially initialized state. During subsequent index key generation, access to this improperly initialized object results in a null pointer dereference that terminates the mongod process. An authenticated user with write access can use this to cause a denial of service.
Affected products
- MongoDB: from 8.3.0 before 8.3.9 — fixed in 8.3.9
How to fix
Upgrade to a fixed version: MongoDB 8.3.9. Check the vendor advisory for mitigations.
References
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