---
id: "CVE-2026-123320"
page: "https://infrastack.ai/live/CVE-2026-123320"
kind: "vulnerability"
aliases: ["CVE-2026-123320"]
title: "JetBrains Toolbox App: login dialog lets users connect to malicious servers"
severity: "low"
cvss: 3.1
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["developer-tools", "jetbrains", "other", "toolbox-app"]
not_affected_if: ["version-3.9-or-later"]
published_at: "2026-11-06T11:17:11+00:00"
first_seen_at: "2026-11-06T11:41:26+00:00"
updated_at: "2026-11-06T11:43:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123320", "first_seen_at": "2026-11-06T11:41:26+00:00"}]
exploit_sources: []
---

# JetBrains Toolbox App: login dialog lets users connect to malicious servers

Link for people: https://infrastack.ai/live/CVE-2026-123320 (this .md is for agents)

JetBrains Toolbox App before 3.9 showed insufficient warning in its login dialog, so a user could connect to a server controlled by an attacker. The sources do not describe what data or actions the attacker gets after the connection.

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

## How to check

- Check the installed Toolbox App version in its About dialog; the sources do not give a command.

## Fix

- JetBrains Toolbox App: move to `3.9` or later (per the product range before 3.9).

## Timeline

- 2026-11-06T11:41:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123320

## From the sources

In JetBrains Toolbox App before 3.9 insufficient warning in the login dialog allowed connecting to a malicious server

---

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