Code Execution Vulnerability in JetBrains CLion Affected by Meson Project Settings
CVE-2026-123831

9.6CRITICAL

Key Information:

Vendor

Jetbrains
Status
Clion
Vendor
CVE Published:
6 November 2026

What is CVE-2026-123831?

A vulnerability has been identified in JetBrains CLion prior to version 2026.2 and specifically in version 2026.1.4. This issue allows for code execution in Safe Mode when certain Meson project settings are utilized, potentially compromising the integrity and security of user environments.

Affected Version(s)

CLion 0 < 2026.2, 2026.1.4

References

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

CVSS V3.1

Score:
9.6
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.