# Project Jupyter Jupyterlab vulnerabilities

Source: https://junglewise.ai/threats/technologies/jupyterlab  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/jupyterlab.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 9 vulnerabilities in Project Jupyter Jupyterlab: 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-102831, was published on 29 September 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 9 (1 critical, 0 exploited in the wild)

## About Project Jupyter Jupyterlab

Web-based interactive development environment for code, notebooks, and data science workflows.

## Latest Project Jupyter Jupyterlab vulnerabilities

- [CVE-2026-102831: JupyterLab HTML output sanitization bypass via clipboard paste](https://junglewise.ai/threats/cve-2026-102831-jupyterlab-is-an-extensible-environment-for-interactive-and) (high, CVSS 8.1, published 29 Sep 2026)
- [CVE-2026-102830: JupyterLab code injection via Plural-Forms header in language pack](https://junglewise.ai/threats/cve-2026-102830-jupyterlab-is-an-extensible-environment-for-interactive-and) (medium, CVSS 6.8, published 29 Sep 2026)
- [CVE-2026-73417: JupyterLab arbitrary code execution via malicious overrides.json](https://junglewise.ai/threats/cve-2026-73417-jupyterlab-arbitrary-code-execution-via-malicious-overrides-json) (medium, CVSS 4, published 13 Aug 2026)
- [CVE-2026-73416: JupyterLab extension blocklist bypass via package name variant](https://junglewise.ai/threats/cve-2026-73416-jupyterlab-extension-blocklist-bypass-via-package-name-variant) (medium, CVSS 4, published 13 Aug 2026)
- [CVE-2026-73627: JupyterLab plugin manager lock-rule enforcement bypass](https://junglewise.ai/threats/cve-2026-73627-jupyterlab-plugin-manager-lock-rule-enforcement-bypass) (info, CVSS 6, published 13 Aug 2026)
- [Jupyter JupyterLab auth bypass in PluginManager lock-rule enforcement](https://junglewise.ai/threats/jupyter-jupyterlab-auth-bypass-in-pluginmanager-lock-rule-enforcement-ac224559) (medium, CVSS 6, published 22 Jul 2026)
- [CVE-2026-42557: Jupyter JupyterLab arbitrary command execution via HTML sanitizer bypass](https://junglewise.ai/threats/cve-2026-42557-jupyter-jupyterlab-arbitrary-command-execution-via-html-sanitizer) (critical, CVSS 9.6, published 13 May 2026)
- [CVE-2026-42266: Project Jupyter JupyterLab privilege escalation in PyPI Extension Manager](https://junglewise.ai/threats/cve-2026-42266-project-jupyter-jupyterlab-privilege-escalation-in-pypi-extension) (high, CVSS 8.8, published 13 May 2026)
- [CVE-2026-40171: PYSEC-2026-2682 - Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS](https://junglewise.ai/threats/cve-2026-40171-jupyter-notebook-authentication-token-theft-via-commandlinker-xss) (medium, CVSS 4, published 6 May 2026)

## Most severe Project Jupyter Jupyterlab vulnerabilities

- [CVE-2026-42557: Jupyter JupyterLab arbitrary command execution via HTML sanitizer bypass](https://junglewise.ai/threats/cve-2026-42557-jupyter-jupyterlab-arbitrary-command-execution-via-html-sanitizer) (critical, CVSS 9.6, published 13 May 2026)
- [CVE-2026-42266: Project Jupyter JupyterLab privilege escalation in PyPI Extension Manager](https://junglewise.ai/threats/cve-2026-42266-project-jupyter-jupyterlab-privilege-escalation-in-pypi-extension) (high, CVSS 8.8, published 13 May 2026)
- [CVE-2026-102831: JupyterLab HTML output sanitization bypass via clipboard paste](https://junglewise.ai/threats/cve-2026-102831-jupyterlab-is-an-extensible-environment-for-interactive-and) (high, CVSS 8.1, published 29 Sep 2026)
- [CVE-2026-102830: JupyterLab code injection via Plural-Forms header in language pack](https://junglewise.ai/threats/cve-2026-102830-jupyterlab-is-an-extensible-environment-for-interactive-and) (medium, CVSS 6.8, published 29 Sep 2026)
- [Jupyter JupyterLab auth bypass in PluginManager lock-rule enforcement](https://junglewise.ai/threats/jupyter-jupyterlab-auth-bypass-in-pluginmanager-lock-rule-enforcement-ac224559) (medium, CVSS 6, published 22 Jul 2026)
- [CVE-2026-73417: JupyterLab arbitrary code execution via malicious overrides.json](https://junglewise.ai/threats/cve-2026-73417-jupyterlab-arbitrary-code-execution-via-malicious-overrides-json) (medium, CVSS 4, published 13 Aug 2026)
- [CVE-2026-73416: JupyterLab extension blocklist bypass via package name variant](https://junglewise.ai/threats/cve-2026-73416-jupyterlab-extension-blocklist-bypass-via-package-name-variant) (medium, CVSS 4, published 13 Aug 2026)
- [CVE-2026-40171: PYSEC-2026-2682 - Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS](https://junglewise.ai/threats/cve-2026-40171-jupyter-notebook-authentication-token-theft-via-commandlinker-xss) (medium, CVSS 4, published 6 May 2026)
- [CVE-2026-73627: JupyterLab plugin manager lock-rule enforcement bypass](https://junglewise.ai/threats/cve-2026-73627-jupyterlab-plugin-manager-lock-rule-enforcement-bypass) (info, CVSS 6, published 13 Aug 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 2 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Project Jupyter technologies

- [Project Jupyter Notebook](https://junglewise.ai/threats/technologies/notebook): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Project Jupyter Jupyterlab vulnerabilities", https://junglewise.ai/threats/technologies/jupyterlab, 12 November 2026.