# CVE-2026-123832: JetBrains CLion code execution via JSON compilation database in Safe Mode

Source: https://junglewise.ai/threats/cve-2026-123832-in-jetbrains-clion-before-2026-2-code-execution-was-possible-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-123832 · Severity: critical · CVSS 9.6 · Published 2026-11-06

JetBrains CLion is a C/C++ integrated development environment used by developers to write and debug code. An attacker could achieve arbitrary code execution even when CLion is running in Safe Mode by crafting a malicious JSON compilation database file. This bypasses intended safety protections and gives an attacker full control over the developer's machine and code.

Technologies: [Jetbrains CLion](https://junglewise.ai/threats/technologies/clion). Vendors: [Jetbrains](https://junglewise.ai/threats/vendors/jetbrains).

## Quick answers

**Is CVE-2026-123832 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123832 being exploited in the wild.

**How severe is CVE-2026-123832?** Critical severity, with a CVSS score of 9.6, published 6 November 2026.

**Which products and versions are affected?** Jetbrains CLion before 2026.2.

**Is there a fix for CVE-2026-123832?** Yes: fixed in CLion 2026.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-123832 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-123832?** Check whether you run Jetbrains CLion 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 CLion 2026.2

## Technical details

Safe Mode in CLion is intended to restrict code execution during startup, but a vulnerability in the JSON compilation database parser allows an unauthenticated local attacker to execute arbitrary code by providing a malicious compilation database file. The vulnerability requires the user to open a project containing the malicious file. The issue is fixed in CLion 2026.2 and later.

## Affected products

- JetBrains CLion before 2026.2

## Timeline

- 2026-11-06: disclosed

## References

- [https://www.jetbrains.com/privacy-security/issues-fixed/](https://www.jetbrains.com/privacy-security/issues-fixed/)

## Related threats

- [JetBrains CLion code execution in Safe Mode via Meson settings](https://junglewise.ai/threats/cve-2026-123831-in-jetbrains-clion-before-2026-2-2026-1-4-code-execution-was)
- [JetBrains CLion missing authentication in debug session on Linux](https://junglewise.ai/threats/cve-2026-123277-in-jetbrains-clion-before-2026-3-2026-2-4-1-missing)
- [JetBrains CLion code execution in Safe Mode via GDB debug profile](https://junglewise.ai/threats/cve-2026-123276-in-jetbrains-clion-before-2026-3-2026-2-4-1-code-execution-was)
- [JetBrains Toolbox App and IDEs compromised certificate trust](https://junglewise.ai/threats/cve-2026-118697-in-jetbrains-toolbox-app-before-3-9-1-and-3-8-2-intellij-idea)
- [JetBrains IDEs embedded browser trusted revoked certificates](https://junglewise.ai/threats/cve-2026-118696-in-jetbrains-intellij-idea-pycharm-phpstorm-rubymine-and)