In JetBrains CLion before 2026.2,
2026.1.4 code execution was possible in Safe Mode via Meson project settings

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0045.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
JetBrains CLion unaffected
Version Status Constraints
0 affected < 2026.2, 2026.1.4

No data.

No data.

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Vendors Products
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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.jetbrains.com/privacy-security/issues-fixed/ cve-icon cve-icon
History

Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Fri, 06 Nov 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains clion
Vendors & Products Jetbrains
Jetbrains clion

Fri, 06 Nov 2026 18:00:00 +0000

Type Values Removed Values Added
Title Code Execution via Unsafe Meson Project Settings in JetBrains CLion Safe Mode

Fri, 06 Nov 2026 16:30:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: JetBrains

Published:

Updated: 2026-11-07T04:55:37.322Z

Reserved: 2026-11-06T16:05:40.324Z

Link: CVE-2026-123831

cve-icon Vulnrichment

Updated: 2026-11-06T16:49:48.871Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-06T17:17:21.240

Modified: 2026-11-07T05:18:15.857

Link: CVE-2026-123831

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T18:15:06Z

Weaknesses