CVE-2026-100256 Code injection in IntelliJ IDEA

High 7.8 Published 30 Sep 2026 Updated 1 Oct 2026

Attackers can execute arbitrary code via Structural Search script constraints in untrusted projects using JetBrains IntelliJ IDEA.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-100256?

CVE-2026-100256 is a high-severity code injection vulnerability in Jetbrains Intellij Idea, published on 30 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In JetBrains IntelliJ IDEA before 2026.2.3 rCE via Structural Search script constraints was possible in untrusted projects

Weakness: CWE-829

Which versions are affected by CVE-2026-100256?

It affects 1 product.

Products include Jetbrains Intellij Idea.

How do I fix CVE-2026-100256?

No fix has been published for CVE-2026-100256 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-100256 being exploited?

There is no known exploitation of CVE-2026-100256 in the wild and no public exploit code.

All Jetbrains Intellij Idea vulnerabilities

Sources

Also known as GHSA-x2cm-2gq8-g82v.