Is CVE-2026-123302 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123302 being exploited in the wild.

How severe is CVE-2026-123302?

High severity, with a CVSS score of 7.8, published 6 November 2026.

Which products and versions are affected?

Jetbrains IntelliJ IDEA before 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2.

Is there a fix for CVE-2026-123302?

Yes: fixed in 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-123302 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-123302?

Check whether you run Jetbrains IntelliJ IDEA at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-123302: JetBrains IntelliJ IDEA code execution via script engine discovery

CVE-2026-123302 · Severity: high · CVSS 7.8 · Published 2026-11-06

JetBrains IntelliJ IDEA is an integrated development environment used by developers to write and debug code. A vulnerability allows attackers to execute arbitrary code on a developer's machine by exploiting script engine discovery when opening untrusted projects, potentially compromising the developer's system and access to source code repositories.

Technologies: Jetbrains IntelliJ IDEA. Vendors: Jetbrains.

Quick answers

Is CVE-2026-123302 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123302 being exploited in the wild.
How severe is CVE-2026-123302?: High severity, with a CVSS score of 7.8, published 6 November 2026.
Which products and versions are affected?: Jetbrains IntelliJ IDEA before 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2.
Is there a fix for CVE-2026-123302?: Yes: fixed in 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-123302 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-123302?: Check whether you run Jetbrains IntelliJ IDEA at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2

Technical details

The vulnerability enables arbitrary code execution through improper script engine discovery in untrusted projects within IntelliJ IDEA. An attacker can craft a malicious project that, when opened in the IDE, triggers the script engine discovery mechanism to execute arbitrary code with the privileges of the IDE process. The attack requires user interaction (opening a project) and affects the IDE's handling of project configurations.

Affected products

JetBrains IntelliJ IDEA before 2026.3, 2026.2.4, 2026.1.5.1, 2025.3.6.2

Timeline

2026-11-06: disclosed

References

https://www.jetbrains.com/privacy-security/issues-fixed/

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