Calling createIndex with certain index types can crash mongod
CVE-2026-8843 is fixed in MongoDB on 1 platform by MongoDB 8.2.6 (version 8.2.6), released February 25, 2026. It is not reported as exploited. Patch Radar priority: High.
Creating a "2dsphere_bucket" index on a non-timeseries bucket collection will succeed, but any subsequent attempt to insert a document which triggers updating that index will crash the server. A similar issue occurs when creating "queryable_encrypted_range" indices. This issue affects MongoDB Server v7.0 versions prior to 7.0.32, v8.0 versions prior to 8.0.21 and v8.2 versions prior to 8.2.6
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| MongoDB | 8.2.6 | MongoDB 8.2.6 | Feb 25, 2026 |
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