---
id: CVE-2026-93763
title: >-
  A protection mechanism failure in the object-document mapper's encryption
  configuration generation can cause fields that an application declared for
  client-side field-level encryption to be written and kept in cleartext,
  without any erro…
summary: >-
  A protection mechanism failure in the object-document mapper's encryption
  configuration generation can cause fields that an application declared for
  client-side field-level encryption to be written and kept in cleartext,
  without any erro…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-312
vendor: mongodb
product: mongoid
affected:
  - 'mongoid >= 9.0.0, < 9.0.12'
  - mongoid = 9.1.0
patched:
  - mongoid 9.0.12
published: '2026-09-18'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:00:39.703'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93763'
references:
  - url: 'https://jira.mongodb.org/browse/MONGOID-5984'
    label: cna@mongodb.com
tags:
  - nvd
  - cve.org
epss: 0.00152
epssPercentile: 0.03637
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T18:14:33.714412Z'
ingestedAt: '2026-09-18T17:46:41.551Z'
---

## Overview

A protection mechanism failure in the object-document mapper's encryption configuration generation can cause fields that an application declared for client-side field-level encryption to be written and kept in cleartext, without any error or warning. A party holding ordinary read access to the database can then read values that were intended to be protected from that party. This may result in unintended disclosure of sensitive information.

## Affected

- `mongoid >= 9.0.0, < 9.0.12`
- `mongoid = 9.1.0`

## Remediation

Upgrade past the affected range:

- `mongoid 9.0.12`