---
id: CVE-2025-54991
title: 'JupyterLab Desktop: TCC Bypass via Insecure Entitlements (macOS)'
summary: >-
  JupyterLab Desktop is the cross-platform desktop application for JupyterLab.
  Prior to 4.6.2-1, JupyterLab Desktop for macOS declared the
  com.apple.security.cs.allow-dyld-environment-variables entitlement, allowing
  the dynamic linker to h…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-250
  - CWE-693
vendor: jupyterlab
product: jupyterlab-desktop
affected:
  - jupyterlab-desktop < 4.6.2-1
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T20:28:05.517Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-54991'
references:
  - url: >-
      https://github.com/jupyterlab/jupyterlab-desktop/security/advisories/GHSA-8cvf-4977-r95v
    label: >-
      https://github.com/jupyterlab/jupyterlab-desktop/security/advisories/GHSA-8cvf-4977-r95v
  - url: >-
      https://github.com/jupyterlab/jupyterlab-desktop/commit/302fb36caca62bbbba7bfaaf0a4966a38cbead44
    label: >-
      https://github.com/jupyterlab/jupyterlab-desktop/commit/302fb36caca62bbbba7bfaaf0a4966a38cbead44
  - url: 'https://github.com/jupyterlab/jupyterlab-desktop/releases/tag/v4.6.2-1'
    label: 'https://github.com/jupyterlab/jupyterlab-desktop/releases/tag/v4.6.2-1'
tags:
  - cve.org
ingestedAt: '2026-11-06T21:04:04.248Z'
epss: 0.00192
epssPercentile: 0.08934
---

## Overview

JupyterLab Desktop is the cross-platform desktop application for JupyterLab. Prior to 4.6.2-1, JupyterLab Desktop for macOS declared the com.apple.security.cs.allow-dyld-environment-variables entitlement, allowing the dynamic linker to honor DYLD_INSERT_LIBRARIES despite the hardened runtime. An attacker who can already execute code as the current user can load an arbitrary dynamic library into the JupyterLab Desktop process and inherit TCC permissions previously granted to the application, including access to protected Documents, Desktop, or Downloads folders without another macOS prompt. Exploitation requires existing local code execution and prior TCC grants; it does not provide initial or remote code execution. Windows and Linux are not affected. This vulnerability is fixed in 4.6.2-1.

## Affected

- `jupyterlab-desktop < 4.6.2-1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.