medium · CVSS v3 4.3

CVE-2026-123291

JetBrains Datalore before 2026.4 contains an improper owner validation flaw that allows an authenticated user to read issues and notebook ru

Overview

JetBrains Datalore before 2026.4 contains an improper owner validation flaw that allows an authenticated user to read issues and notebook runs from other workspaces. This can expose sensitive operational data and potentially lead to data leakage. The vulnerability is rated medium severity.

Description

In JetBrains Datalore before 2026.4 improper owner validation allowed reading another workspace's issues and runs notebook

Impact

Confidentiality: unauthorized disclosure of workspace issues and notebook runs. Integrity: potential misinterpretation of data. Availability: not directly impacted. Defenders: administrators and users of JetBrains Datalore workspaces.

Remediation

Apply the 2026.4 release or later to fix the owner validation bug. If upgrading is delayed, enforce least‑privilege permissions on workspaces, disable external sharing of issue data, and monitor API calls for cross‑workspace access. Consider isolating sensitive workspaces in separate projects or environments.

Risk context

The CVSS v3 score is 4.3 (medium). No EPSS data is available. While not critical, the flaw can lead to data leakage and should be addressed promptly.

Affected products

  • JetBrains Datalore

Scores

Severity
medium
CVSS v2
4
CVSS v3
4.3
CVSS v4
—
EPSS
—

jetbrains datalore owner-validation confidentiality medium workspace data-leak

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