---
id: CVE-2026-114644
title: >-
  Memory-exhaustion denial of service via unbounded symbol interning during
  BSON/JSON deserialization
summary: >-
  The MongoDB C# Driver's BSON library contains an uncontrolled resource
  consumption weakness in its deserialization handling of one BSON value type.
  An application that deserializes untrusted content with the library retains
  data derived …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: MongoDB
product: C# Driver
affected:
  - c_driver >= 2.0.0 < 3.13.0
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T21:25:31.189Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114644'
references:
  - url: 'https://jira.mongodb.org/browse/CSHARP-6162'
  - url: 'https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0'
  - url: >-
      https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-x24v-h3xm-qf9x
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.445Z'
---

## Overview

The MongoDB C# Driver's BSON library contains an uncontrolled resource consumption weakness in its deserialization handling of one BSON value type. An application that deserializes untrusted content with the library retains data derived from that content for the lifetime of the process, with no limit on how much accumulates. An unauthenticated remote party who can cause such content to be deserialized can drive unbounded memory growth, exhausting the host application's available memory and denying service. There is no impact to confidentiality or integrity, and no MongoDB server component is affected.

## Affected

- `c_driver >= 2.0.0 < 3.13.0`

## Remediation

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