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  4. CVE 2025 54991 jupyterlab desktop tcc bypass via insecure
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Back to active CVEs
Medium · CVSS 5.5CVE-2025-54991

JupyterLab Desktop: TCC Bypass via Insecure Entitlements (macOS)CVE-2025-54991

Answer in brief

CVE-2025-54991 records a Medium severity (CVSS 5.5) vulnerability in JupyterLab Desktop: TCC Bypass via Insecure Entitlements (macOS). The current sources do not mark it as known exploited. The current feed maps jupyterlab/jupyterlab-desktop (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jupyterlab/jupyterlab-desktop (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
jupyterlab/jupyterlab-desktopgeneric<4.6.2-14.6.2-1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for jupyterlab/jupyterlab-desktop.
  2. 2Review the reported fix. Update jupyterlab/jupyterlab-desktop to 4.6.2-1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • JupyterLab Desktop: TCC Bypass via Misconfigured Node FusesSame jupyterlab/jupyterlab-desktop package
  • JupyterLab Desktop: Cross-Site Scripting (XSS) leading to Remote Code Execution on Connect URLSame jupyterlab/jupyterlab-desktop package
  • JupyterLab Desktop: One-Click Jupyter Server Token Leak leading to Remote Code ExecutionSame jupyterlab/jupyterlab-desktop package

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-250, CWE-693
Source
CVE List V5
Source checked
Nov 6, 2026
References
3 linked sources
Open source record