---
id: "CVE-2026-123304"
page: "https://infrastack.ai/live/CVE-2026-123304"
kind: "vulnerability"
aliases: ["CVE-2026-123304"]
title: "JetBrains IntelliJ IDEA: opening untrusted projects can run code via ShellCheck path"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["developer-tools", "intellij-idea", "jetbrains", "package"]
not_affected_if: ["trusted-projects-only", "version-2026.3-or-later"]
published_at: "2026-11-06T11:17:09+00:00"
first_seen_at: "2026-11-06T11:41:25+00:00"
updated_at: "2026-11-06T11:41:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123304", "first_seen_at": "2026-11-06T11:41:25+00:00"}]
exploit_sources: []
---

# JetBrains IntelliJ IDEA: opening untrusted projects can run code via ShellCheck path

Link for people: https://infrastack.ai/live/CVE-2026-123304 (this .md is for agents)

In JetBrains IntelliJ IDEA before 2026.3, a project can configure a ShellCheck path that the IDE executes, so opening an untrusted project can run code on the developer's machine. An attacker who supplies a malicious project gets code execution as the developer's user.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the IntelliJ IDEA version under Help > About, or run `idea --version` where the CLI launcher is installed.
- Look for IDEA versions below `2026.3` on developer machines.
- Review whether the ShellCheck path is configured in any project you open.

## Fix

- JetBrains IntelliJ IDEA: move to `2026.3` or later (fixed version per the description).

## Timeline

- 2026-11-06T11:41:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123304

## From the sources

In JetBrains IntelliJ IDEA before 2026.3 code execution in untrusted projects via a configured ShellCheck path

---

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