---
id: "CVE-2026-123314"
page: "https://infrastack.ai/live/CVE-2026-123314"
kind: "vulnerability"
aliases: ["CVE-2026-123314"]
title: "JetBrains IntelliJ IDEA: XML response can trigger XXE file reads"
severity: "low"
cvss: 3.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["developers", "http-client", "intellij-idea", "jetbrains", "package"]
not_affected_if: ["fixed-version", "no-untrusted-http-requests"]
published_at: "2026-11-06T11:17:10+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-2026-123314", "first_seen_at": "2026-11-06T11:41:26+00:00"}]
exploit_sources: []
---

# JetBrains IntelliJ IDEA: XML response can trigger XXE file reads

Link for people: https://infrastack.ai/live/CVE-2026-123314 (this .md is for agents)

Before JetBrains IntelliJ IDEA 2026.3 and 2026.2.4, an XML response handled by the built-in HTTP Client could trigger an XML external entity (XXE) attack. An attacker who controls the server the IDE queries could potentially read local files or reach internal resources.

_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 launcher is available.
- Compare against the fixed versions: before `2026.3` and before `2026.2.4` are affected.

## Fix

- JetBrains IntelliJ IDEA: move to `2026.3` or `2026.2.4`.

## Timeline

- 2026-11-06T11:41:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123314

## From the sources

In JetBrains IntelliJ IDEA before 2026.3, 
2026.2.4 xXE attack was possible via an XML response to an HTTP Client request

---

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