# CVE-2026-123282: JetBrains Datalore missing token expiration validation

Source: https://junglewise.ai/threats/cve-2026-123282-in-jetbrains-datalore-before-2026-4-missing-expiration  
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-2026-123282 · Severity: high · CVSS 7.4 · Published 2026-11-06

JetBrains Datalore is a cloud-based data science platform that allows users to analyze and collaborate on data projects. A flaw in its session token validation allows authenticated attackers to create new sessions by reusing expired account tokens, potentially enabling unauthorized access to user accounts and data.

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

## Quick answers

**Is CVE-2026-123282 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123282 being exploited in the wild.

**How severe is CVE-2026-123282?** High severity, with a CVSS score of 7.4, published 6 November 2026.

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

**Is there a fix for CVE-2026-123282?** 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-2026-123282 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-123282?** 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 involves missing expiration validation of account tokens in JetBrains Datalore, allowing an authenticated user to establish a new session with an expired token. This is an authentication bypass affecting the session management component. An authenticated attacker can reuse expired tokens to gain unauthorized access.

## Affected products

- JetBrains Datalore before 2026.4

## Timeline

- 2026-11-06: disclosed

## References

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

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