# CVE-2026-113870: Improper Encoding of Server-Supplied JavaScript Values in MongoDB Compass BSON Parsing

CVE-2026-113870 is fixed in 3 products on 1 platform, first by MongoDB Compass 1.49.15.0, released August 25, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-113870
- Priority: High
- CVSS: 8.6
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2026
- Weakness: CWE-116: Improper Encoding or Escaping of Output
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-113870

## Description

MongoDB Compass improperly escapes certain BSON values when converting a stored view’s aggregation pipeline into editable source. When a user connects to a MongoDB deployment containing a specially crafted view and opens that view for editing, the values can cause arbitrary code to execute with the privileges of the user running Compass.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | MongoDB Compass | 1.49.15.0 | [MongoDB Compass 1.49.15.0](https://patchblox.com/security/data/fix/windows-app/mongodb.compass.full-1.49.15.0.md) | Aug 25, 2026 |
| Windows apps | MongoDB Compass Isolated Edition | 1.49.15.0 | [MongoDB Compass Isolated Edition 1.49.15.0](https://patchblox.com/security/data/fix/windows-app/mongodb.compass.isolated-1.49.15.0.md) | Aug 25, 2026 |
| Windows apps | MongoDB Compass Readonly | 1.49.15.0 | [MongoDB Compass Readonly 1.49.15.0](https://patchblox.com/security/data/fix/windows-app/mongodb.compass.readonly-1.49.15.0.md) | Aug 25, 2026 |

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Data as of 2026-11-10T07:50:38Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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