---
id: CVE-2026-123301
title: >-
  In JetBrains IntelliJ IDEA before 2026.3 dOM-based XSS in the OpenAPI preview
  error view was possible
summary: >-
  In JetBrains IntelliJ IDEA before 2026.3 dOM-based XSS in the OpenAPI preview
  error view was possible
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: JetBrains
product: IntelliJ IDEA
affected:
  - intellij_idea < 2026.3
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T10:27:58.145Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123301'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.364Z'
---

## Overview

In JetBrains IntelliJ IDEA before 2026.3 dOM-based XSS in the OpenAPI preview error view was possible

## Affected

- `intellij_idea < 2026.3`

## Remediation

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