CVE-2026-123831: Security vulnerability

Published Nov 6, 2026

Updated

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

Event History

Nov 6, 2026

CVE Published

via MITRE·04:09 PM

Data Sourced

via MITRE·04:09 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·05:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Which CLion versions need to be updated?

CLion versions before 2026.2 are affected, including the 2026.1.4 release referenced in the advisory. Update to 2026.2 or later.

Can Safe Mode be relied on to prevent this code-execution issue?

No. Code execution was possible in Safe Mode through Meson project settings, so opening Meson projects in Safe Mode does not eliminate the risk on affected versions.

What project content is relevant to exploitation?

The issue is associated with Meson project settings. Treat Meson project settings from untrusted projects as potentially unsafe until CLion has been updated.

CVE-2026-123831: Security vulnerability

Event History

Frequently Asked Questions

Which CLion versions need to be updated?

Can Safe Mode be relied on to prevent this code-execution issue?

What project content is relevant to exploitation?

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Resources

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Frequently Asked Questions

Which CLion versions need to be updated?

Can Safe Mode be relied on to prevent this code-execution issue?

What project content is relevant to exploitation?