# CVE-2026-8843: 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-8843
- Priority: High
- CVSS: 7.1
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 18, 2026
- Weakness: CWE-617: Reachable Assertion
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-8843

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | MongoDB | 8.2.6 | [MongoDB 8.2.6](https://patchblox.com/security/data/fix/windows-app/mongodb.server-8.2.6.md) | Feb 25, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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