---
id: CVE-2026-102831
title: >-
  JupyterLab is an extensible environment for interactive and reproducible
  computing, based on the Jupyter Notebook Architecture
summary: >-
  JupyterLab is an extensible environment for interactive and reproducible
  computing, based on the Jupyter Notebook Architecture. From JupyterLab 4.5.0
  until 4.5.11 and 4.6.4, from Notebook 7.5.0 until 7.6.3, and from JupyterLite
  Core 0.7.…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-79
  - CWE-345
vendor: jupyterlab
product: jupyterlab
affected:
  - 'jupyterlab >= 4.5.0, < 4.5.11'
  - 'jupyterlab >= 4.6.0, < 4.6.4'
  - 'notebook >= 7.5.0, < 7.6.3'
  - 'jupyterlite-core >= 0.7.0, < 0.8.4'
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T19:17:25.700'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102831'
references:
  - url: >-
      https://github.com/jupyterlab/jupyterlab/commit/1a10a7da5ff655849b21581c2633b46483ae0be9
    label: security-advisories@github.com
  - url: >-
      https://github.com/jupyterlab/jupyterlab/commit/7f9f29e29e0c83fb17b0f11da57d06b3c6a40d96
    label: security-advisories@github.com
  - url: >-
      https://github.com/jupyterlab/jupyterlab/commit/cf6e89a8d315c4134cefa50c220bca296da466a7
    label: security-advisories@github.com
  - url: 'https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.11'
    label: security-advisories@github.com
  - url: 'https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-6966-vjj6-99xv
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T19:44:04.150Z'
---

## Overview

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 4.5.0 until 4.5.11 and 4.6.4, from Notebook 7.5.0 until 7.6.3, and from JupyterLite Core 0.7.0 until 0.8.4, the system clipboard cell-paste path accepts attacker-controlled cell JSON without clearing metadata.trusted. When useSystemClipboardForCells is active and pasteCodeCellsWithoutOutput is disabled, a pasted code cell can mark HTML output as trusted, bypass output sanitization, and execute script in the authenticated JupyterLab origin without executing the cell. Markdown and raw cells are not affected because their output is sanitized. This issue is fixed in JupyterLab 4.5.11 and 4.6.4, Notebook 7.6.3, and JupyterLite Core 0.8.4.

## Remediation

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