---
id: "CVE-2026-123845"
page: "https://infrastack.ai/live/CVE-2026-123845"
kind: "vulnerability"
aliases: ["CVE-2026-123845"]
title: "JetBrains IntelliJ IDEA: path traversal via JSON Schema references in untrusted projects"
severity: "low"
cvss: 3.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["intellij-idea", "jetbrains", "json-schema", "other"]
not_affected_if: ["trusted-projects-only", "version-2026.3-or-later"]
published_at: "2026-11-06T17:17:23+00:00"
first_seen_at: "2026-11-06T17:43:13+00:00"
updated_at: "2026-11-06T17:45:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123845", "first_seen_at": "2026-11-06T17:43:13+00:00"}]
exploit_sources: []
---

# JetBrains IntelliJ IDEA: path traversal via JSON Schema references in untrusted projects

Link for people: https://infrastack.ai/live/CVE-2026-123845 (this .md is for agents)

In JetBrains IntelliJ IDEA before 2026.3, a crafted JSON Schema reference in an untrusted project could make the IDE resolve paths outside the project. The sources do not say what files an attacker can read or write.

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

## How to check

- Check the installed IntelliJ IDEA version under Help > About, or run `idea --version` if the launcher is on the PATH.
- Treat any version below `2026.3` as affected.

## Fix

- JetBrains IntelliJ IDEA: upgrade to `2026.3` or later (per the NVD entry's affected range).

## Timeline

- 2026-11-06T17:43:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123845

## From the sources

In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via JSON Schema references in untrusted projects

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_