CVE-2026-123831

Code Execution via Unsafe Meson Project Settings in JetBrains CLion Safe Mode

Published Nov 6, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Description
In JetBrains CLion before 2026.2,
2026.1.4 code execution was possible in Safe Mode via Meson project settings

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains clion
Vendors & Products Jetbrains
Jetbrains clion
Type Values Removed Values Added
Title Code Execution via Unsafe Meson Project Settings in JetBrains CLion Safe Mode
Type Values Removed Values Added
Description In JetBrains CLion before 2026.2, 2026.1.4 code execution was possible in Safe Mode via Meson project settings
Weaknesses CWE-829
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JetBrains
Published
Updated
Nov 7, 2026, 4:55 AM
Reserved
Nov 6, 2026, 4:05 PM
Status
Awaiting Analysis
Published
Nov 6, 2026, 5:17 PM
Modified
Nov 7, 2026, 5:18 AM