CVE-2025-54991

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.

• CWE-250
• CWE-693

• https://github.com/jupyterlab/jupyterlab-desktop/commit/302fb36caca62bbbba7bfaaf0a4966a38cbead44
• https://github.com/jupyterlab/jupyterlab-desktop/releases/tag/v4.6.2-1
• https://github.com/jupyterlab/jupyterlab-desktop/security/advisories/GHSA-8cvf-4977-r95v

Published

Nov 6, 2026

Last Modified

Nov 12, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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