---
id: "CVE-2026-123312"
page: "https://infrastack.ai/live/CVE-2026-123312"
kind: "vulnerability"
aliases: ["CVE-2026-123312"]
title: "JetBrains IntelliJ IDEA: opening project files can trigger server-side request forgery"
severity: "low"
cvss: 3.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["intellij-idea", "java", "jetbrains", "kotlin", "other"]
not_affected_if: ["fixed-version", "trusted-projects-only"]
published_at: "2026-11-06T11:17:10+00:00"
first_seen_at: "2026-11-06T11:41:26+00:00"
updated_at: "2026-11-06T11:42:47+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123312", "first_seen_at": "2026-11-06T11:41:26+00:00"}]
exploit_sources: []
---

# JetBrains IntelliJ IDEA: opening project files can trigger server-side request forgery

Link for people: https://infrastack.ai/live/CVE-2026-123312 (this .md is for agents)

Before IntelliJ IDEA 2026.3 and 2026.2.4, a crafted annotations.xml file could make the IDE send requests to addresses the attacker chooses during indexing. An attacker could use this to reach internal services from a developer's machine.

_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.

## Fix

- Upgrade IntelliJ IDEA to `2026.3` or `2026.2.4`; the sources state these as the fixed versions.

## Timeline

- 2026-11-06T11:41:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123312

## From the sources

In JetBrains IntelliJ IDEA before 2026.3, 
2026.2.4 sSRF was possible via annotations.xml files during indexing

---

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