---
id: CVE-2026-82052
title: >-
  The $regexFindAll expression can be used by an authenticated user who can run
  aggregation pipeline stages to crash a MongoDB server (mongod)
summary: "The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the\_ regex match can start in the middle of a multi-code-unit…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
vendor: mongodb
product: mongodb
affected:
  - 'mongodb >= 7.0.0, < 7.0.41'
  - 'mongodb >= 8.0.0, < 8.0.30'
  - 'mongodb >= 8.3.0, < 8.3.9'
patched:
  - mongodb 8.3.9
published: '2026-09-08'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:40:42.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82052'
references:
  - url: 'https://jira.mongodb.org/browse/SERVER-127985'
    label: cna@mongodb.com
  - url: 'https://jira.mongodb.org/browse/SERVER-124077'
    label: cna@mongodb.com
tags:
  - nvd
  - cve.org
epss: 0.0035
epssPercentile: 0.28713
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T17:55:24.603574Z'
ingestedAt: '2026-09-08T16:34:19.257Z'
---

## Overview

The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the  regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.

## Affected

- `mongodb >= 7.0.0, < 7.0.41`
- `mongodb >= 8.0.0, < 8.0.30`
- `mongodb >= 8.3.0, < 8.3.9`

## Remediation

Upgrade past the affected range:

- `mongodb 8.3.9`