# CVE-2026-123284: JetBrains Datalore improper authorization on workspace moves

Source: https://junglewise.ai/threats/cve-2026-123284-in-jetbrains-datalore-before-2026-4-improper-authorisation-on  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-123284 · Severity: medium · CVSS 6.5 · Published 2026-11-06

JetBrains Datalore is a collaborative data analysis platform where teams work on shared notebooks and datasets. A flaw in authorization checks allows view-only collaborators to modify content during workspace move operations, enabling unauthorized changes to shared projects despite restricted permissions.

Technologies: [Jetbrains Datalore](https://junglewise.ai/threats/technologies/datalore). Vendors: [Jetbrains](https://junglewise.ai/threats/vendors/jetbrains).

## Quick answers

**Is CVE-2026-123284 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123284 being exploited in the wild.

**How severe is CVE-2026-123284?** Medium severity, with a CVSS score of 6.5, published 6 November 2026.

**Which products and versions are affected?** Jetbrains Datalore before 2026.4.

**Is there a fix for CVE-2026-123284?** Yes: fixed in Datalore 2026.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-123284 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-123284?** Check whether you run Jetbrains Datalore at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Datalore 2026.4

## Technical details

An improper authorization vulnerability in JetBrains Datalore before version 2026.4 fails to enforce permission checks during workspace move operations. View-only collaborators can exploit this to gain write access and modify shared content. The vulnerability requires network access and an authenticated user account with view-only permissions.

## Affected products

- JetBrains Datalore before 2026.4

## Timeline

- 2026-11-06: disclosed
- 2026-11-06: patched: Version 2026.4 released

## References

- [https://www.jetbrains.com/privacy-security/issues-fixed/](https://www.jetbrains.com/privacy-security/issues-fixed/)

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