CVE-2026-102831

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.

• CWE-79
• CWE-345

• https://github.com/jupyterlab/jupyterlab/commit/1a10a7da5ff655849b21581c2633b46483ae0be9
• https://github.com/jupyterlab/jupyterlab/commit/7f9f29e29e0c83fb17b0f11da57d06b3c6a40d96
• https://github.com/jupyterlab/jupyterlab/commit/cf6e89a8d315c4134cefa50c220bca296da466a7
• https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.11
• https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.4
• https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-6966-vjj6-99xv

Published

Sep 29, 2026

Last Modified

Oct 2, 2026

Status

Awaiting Analysis

• Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-102826simple-git, an interface for running git commands in any nod…8.1
• CVE-2026-102827simple-git, an interface for running git commands in any nod…9.8
• CVE-2026-102828simple-git, an interface for running git commands in any nod…9.8
• CVE-2026-102829simple-git, an interface for running git commands in any nod…9.2
• CVE-2026-10283A vulnerability was detected in Bottelet DaybydayCRM up to 2…6.3
• CVE-2026-102830JupyterLab is an extensible environment for interactive and …6.8
• CVE-2026-102832JupyterLab is an extensible environment for interactive and …4.2
• CVE-2026-102834JavaCV provides Java interfaces to OpenCV, FFmpeg, and other…7.5
• CVE-2026-10284A flaw has been found in DevaslanPHP project-management up t…5.4
• CVE-2026-102842A vulnerability was identified in gedelumbung HospitalManage…6.3
• CVE-2026-102843A security flaw has been discovered in gedelumbung HospitalM…4.7
• CVE-2026-102844A weakness has been identified in gedelumbung HospitalManage…2.7