Quick answers
- Is CVE-2026-123849 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-123849 being exploited in the wild.
- How severe is CVE-2026-123849?
- High severity, with a CVSS score of 7, published 6 November 2026.
- Which products and versions are affected?
- Jetbrains IntelliJ IDEA before 2026.3.
- Is there a fix for CVE-2026-123849?
- Yes: fixed in IntelliJ IDEA 2026.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-123849 attacked?
- It is attacked with local access, in a web application.
- Am I affected by CVE-2026-123849?
- 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: IntelliJ IDEA 2026.3
Technical details
The Terraform File Watchers feature in IntelliJ IDEA before version 2026.3 fails to properly validate or sandbox execution of code from untrusted projects, allowing remote code execution when a developer opens a malicious project. An attacker can craft a project containing malicious Terraform configurations that execute arbitrary code with the privileges of the developer's IDE process.
Affected products
- JetBrains IntelliJ IDEA before 2026.3
Timeline
- 2026-11-06: disclosed
- 2026-11-06: patched