---
id: CVE-2026-123289
title: >-
  In JetBrains Datalore before 2026.4 improper authorisation allowed notebook
  viewers to modify files
summary: >-
  In JetBrains Datalore before 2026.4 improper authorisation allowed notebook
  viewers to modify files
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-863
vendor: JetBrains
product: Datalore
affected:
  - Datalore < 2026.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T14:02:26.131216Z'
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T14:42:51.356Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123289'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.371Z'
---

## Overview

In JetBrains Datalore before 2026.4 improper authorisation allowed notebook viewers to modify files

## Affected

- `Datalore < 2026.4`

## Remediation

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