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