---
id: CVE-2026-123281
title: >-
  In JetBrains Datalore before 2026.4 notebook code could execute commands in
  the sidecar container via the mount broker
summary: >-
  In JetBrains Datalore before 2026.4 notebook code could execute commands in
  the sidecar container via the mount broker
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-88
vendor: JetBrains
product: Datalore
affected:
  - Datalore < 2026.4
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T10:27:48.743Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123281'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.375Z'
---

## Overview

In JetBrains Datalore before 2026.4 notebook code could execute commands in the sidecar container via the mount broker

## Affected

- `Datalore < 2026.4`

## Remediation

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