---
id: CVE-2026-123840
title: >-
  In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote
  Development editor tabs
summary: >-
  In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote
  Development editor tabs
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-80
vendor: JetBrains
product: IntelliJ IDEA
affected:
  - intellij_idea < 2026.3
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:10:03.819Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123840'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
tags:
  - cve.org
ingestedAt: '2026-11-06T16:57:43.364Z'
---

## Overview

In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs

## Affected

- `intellij_idea < 2026.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.