---
id: CVE-2026-114648
title: >-
  NoSQL injection via dot and dollar characters in LINQ filter field names and
  dictionary keys
summary: >-
  The MongoDB C# Driver does not neutralize dot and dollar characters in
  dictionary keys, field names and array-filter identifiers used in LINQ queries
  before placing them into the field paths it sends to the server. An
  application user wh…
severity: high
cvss: 7.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-943
vendor: MongoDB
product: C# Driver
affected:
  - c_driver >= 2.14.0 < 3.13.0
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T21:25:34.474Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114648'
references:
  - url: 'https://jira.mongodb.org/browse/CSHARP-6181'
  - url: 'https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0'
  - url: >-
      https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-2xqr-fxmx-2cmf
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.447Z'
---

## Overview

The MongoDB C# Driver does not neutralize dot and dollar characters in dictionary keys, field names and array-filter identifiers used in LINQ queries before placing them into the field paths it sends to the server. An application user whose input reaches these positions can redirect a query or update to fields the application did not name, which can expose other users' documents and widen updates beyond the intended data. Certain values can also write malformed fields that leave stored documents unreadable by the application until they are repaired.

## Affected

- `c_driver >= 2.14.0 < 3.13.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.