Quick answers
- Is CVE-2026-123834 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-123834 being exploited in the wild.
- How severe is CVE-2026-123834?
- High severity, with a CVSS score of 7.5, published 6 November 2026.
- Which products and versions are affected?
- Jetbrains Datalore before 2026.4.
- Is there a fix for CVE-2026-123834?
- 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-2026-123834 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-123834?
- 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
The vulnerability is an improper scope validation flaw in database task functionality that fails to restrict service account access to the correct workspace boundary. An attacker with access to one Datalore workspace can exploit this to use another workspace's service account credentials, gaining unauthorized database access. A fix is available in version 2026.4 and later.
Affected products
- JetBrains Datalore before 2026.4
Timeline
- 2026-11-06: disclosed