# CVE-2026-123304: JetBrains IntelliJ IDEA code execution via ShellCheck path

Source: https://junglewise.ai/threats/cve-2026-123304-in-jetbrains-intellij-idea-before-2026-3-code-execution-in  
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-2026-123304 · Severity: high · CVSS 7.8 · Published 2026-11-06

JetBrains IntelliJ IDEA is a development IDE used by software engineers to write and debug code. A vulnerability allows an attacker to execute arbitrary code when a developer opens an untrusted project if a malicious ShellCheck tool path is configured. This could lead to complete compromise of the developer's machine and access to sensitive source code or credentials.

Technologies: [Jetbrains IntelliJ IDEA](https://junglewise.ai/threats/technologies/intellij-idea). Vendors: [Jetbrains](https://junglewise.ai/threats/vendors/jetbrains).

## Quick answers

**Is CVE-2026-123304 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123304 being exploited in the wild.

**How severe is CVE-2026-123304?** High severity, with a CVSS score of 7.8, published 6 November 2026.

**Which products and versions are affected?** Jetbrains IntelliJ IDEA before 2026.3.

**Is there a fix for CVE-2026-123304?** Yes: fixed in IntelliJ IDEA 2026.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-123304 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-123304?** Check whether you run Jetbrains IntelliJ IDEA 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 IntelliJ IDEA 2026.3

## Technical details

The vulnerability is a code execution flaw in IntelliJ IDEA prior to version 2026.3 that occurs when a ShellCheck path is configured. An attacker can exploit this by crafting a malicious project that, when opened by a developer, leverages the configured ShellCheck path to execute arbitrary code. This requires user interaction (opening the project) and local execution context but results in full code execution.

## Affected products

- JetBrains IntelliJ IDEA before 2026.3

## 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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