# CVE-2026-1847: MongoDB Server may crash when inserting large documents

CVE-2026-1847 is fixed in MongoDB on 1 platform by MongoDB 8.2.4 (version 8.2.4), released January 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-1847
- Priority: High
- CVSS: 7.1
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 10, 2026
- Weakness: CWE-770: Allocation of Resources Without Limits or Throttling
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-1847

## Description

Inserting certain large documents into a replica set could lead to replica set secondaries not being able to fetch the oplog from the primary. This could stall replication inside the replica set leading to server crash.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | MongoDB | 8.2.4 | [MongoDB 8.2.4](https://patchblox.com/security/data/fix/windows-app/mongodb.server-8.2.4.md) | Jan 15, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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