---
id: "CVE-2026-123277"
page: "https://infrastack.ai/live/CVE-2026-123277"
kind: "vulnerability"
aliases: ["CVE-2026-123277"]
title: "JetBrains CLion: missing authentication leaks debug session environment to local users"
severity: "medium"
cvss: 5.0
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["clion", "jetbrains", "linux", "other"]
not_affected_if: ["non-linux", "single-user-machine"]
published_at: "2026-11-06T11:17:05+00:00"
first_seen_at: "2026-11-06T11:41:24+00:00"
updated_at: "2026-11-06T11:42:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123277", "first_seen_at": "2026-11-06T11:41:24+00:00"}]
exploit_sources: []
---

# JetBrains CLion: missing authentication leaks debug session environment to local users

Link for people: https://infrastack.ai/live/CVE-2026-123277 (this .md is for agents)

In JetBrains CLion before 2026.3 and 2026.2.4.1, a flaw in the debugger lets a local user obtain the debug session environment on Linux. The sources do not say what the environment contains beyond that.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the CLion version under Help > About: versions before `2026.3` on the `2026.2.x` line below `2026.2.4.1` are in scope.

## Fix

- JetBrains CLion: move to `2026.3` or `2026.2.4.1`, the versions named in the advisory text.

## Timeline

- 2026-11-06T11:41:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123277

## From the sources

In JetBrains CLion before 2026.3, 
2026.2.4.1 missing authentication allowed local users to obtain the debug session environment on Linux

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_