# Jupyter vulnerabilities Source: https://junglewise.ai/threats/vendors/jupyter Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/jupyter.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 18 vulnerabilities in Jupyter: 0 in the last 7 days and 4 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, CVE-2026-114140, was published on 21 October 2026. 3 vulnerabilities in the last four weeks, up from none in the four before. 3 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 2 - Last 90 days: 4 - All time: 18 (3 critical, 0 exploited in the wild) ## About Jupyter A non-profit organization and open-source project created to develop open-source software, open standards, and services for interactive computing. ## Latest Jupyter vulnerabilities - [CVE-2026-114140: Jupyter nbconvert path traversal via output filename metadata](https://junglewise.ai/threats/cve-2026-114140-the-nbconvert-tool-jupyter-nbconvert-converts-jupyter-notebooks) (high, CVSS 4, published 21 Oct 2026) - [CVE-2026-114135: Jupyter Server authorization bypass in kernel gateway handlers](https://junglewise.ai/threats/cve-2026-114135-jupyter-server-is-the-backend-for-jupyter-web-applications-from) (high, CVSS 8.8, published 21 Oct 2026) - [CVE-2026-102832: JupyterLab command link trust prompt marks wrong document](https://junglewise.ai/threats/cve-2026-102832-jupyterlab-command-link-trust-prompt-in-jupyterlab-can-trust-a) (medium, CVSS 4.2, published 13 Oct 2026) - [CVE-2026-86258: Jupyter nbviewer path traversal in LocalFileHandler](https://junglewise.ai/threats/cve-2026-86258-jupyter-nbviewer-path-traversal-in-localfilehandler) (medium, CVSS 5.9, published 6 Sep 2026) - [CVE-2026-44182: Jupyter Enterprise Gateway YAML injection in Kubernetes manifest rendering](https://junglewise.ai/threats/cve-2026-44182-jupyter-enterprise-gateway-yaml-injection-in-kubernetes-manifest) (critical, CVSS 4, published 16 Jul 2026) - [CVE-2026-44181: Jupyter Enterprise Gateway SSTI in Kubernetes manifest rendering](https://junglewise.ai/threats/cve-2026-44181-jupyter-enterprise-gateway-ssti-in-kubernetes-manifest-rendering) (critical, CVSS 10, published 16 Jul 2026) - [CVE-2026-44180: Jupyter Enterprise Gateway UID/GID restriction bypass in ContainerProcessProxy](https://junglewise.ai/threats/cve-2026-44180-jupyter-enterprise-gateway-uid-gid-restriction-bypass-in) (critical, CVSS 9.8, published 16 Jul 2026) - [CVE-2026-6658: Jupyter nbconvert Cross-site Scripting in Mermaid HTML export](https://junglewise.ai/threats/cve-2026-6658-jupyter-nbconvert-cross-site-scripting-in-mermaid-html-export) (medium, CVSS 5.4, published 26 Jun 2026) - [CVE-2026-6657: Jupyter Jupyter Server CORS bypass via improper origin validation](https://junglewise.ai/threats/cve-2026-6657-jupyter-jupyter-server-cors-bypass-via-improper-origin-validation) (medium, CVSS 6.1, published 3 Jun 2026) - [CVE-2026-5422: Jupyter jupyter-server path traversal in _get_os_path](https://junglewise.ai/threats/cve-2026-5422-jupyter-jupyter-server-path-traversal-in-get-os-path) (medium, CVSS 6.8, published 2 Jun 2026) - [CVE-2026-40934: Jupyter Server insufficient session expiration after password reset](https://junglewise.ai/threats/cve-2026-40934-jupyter-server-insufficient-session-expiration-after-password) (medium, CVSS 6.8, published 5 May 2026) - [CVE-2026-40110: Jupyter Jupyter Server CORS bypass via improper Origin validation](https://junglewise.ai/threats/cve-2026-40110-jupyter-jupyter-server-cors-bypass-via-improper-origin-validation) (high, CVSS 7.3, published 5 May 2026) - [CVE-2026-35397: Jupyter Server path traversal in REST API](https://junglewise.ai/threats/cve-2026-35397-jupyter-server-path-traversal-in-rest-api) (high, CVSS 8.8, published 5 May 2026) - [CVE-2025-61669: Jupyter Server open redirect in LoginFormHandler via next parameter](https://junglewise.ai/threats/cve-2025-61669-jupyter-server-open-redirect-in-loginformhandler-via-next) (medium, CVSS 6.1, published 5 May 2026) - [CVE-2026-39378: nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding](https://junglewise.ai/threats/cve-2026-39378-nbconvert-has-an-arbitrary-file-read-via-path-traversal-in) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2026-39377: nbconvert has an Arbitrary File Write via Path Traversal in Cell Attachment Filenames](https://junglewise.ai/threats/cve-2026-39377-nbconvert-has-an-arbitrary-file-write-via-path-traversal-in-cell) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2026-34052: JupyterHub LTI Authenticator denial of service via unbounded memory growth](https://junglewise.ai/threats/cve-2026-34052-jupyterhub-lti-authenticator-denial-of-service-via-unbounded) (medium, CVSS 5.9, published 3 Apr 2026) - [CVE-2020-26275: Jupyter Server open redirect vulnerability](https://junglewise.ai/threats/cve-2020-26275-jupyter-server-open-redirect-vulnerability) (medium, CVSS 6.1, published 21 Dec 2020) ## Most severe Jupyter vulnerabilities - [CVE-2026-44181: Jupyter Enterprise Gateway SSTI in Kubernetes manifest rendering](https://junglewise.ai/threats/cve-2026-44181-jupyter-enterprise-gateway-ssti-in-kubernetes-manifest-rendering) (critical, CVSS 10, published 16 Jul 2026) - [CVE-2026-44180: Jupyter Enterprise Gateway UID/GID restriction bypass in ContainerProcessProxy](https://junglewise.ai/threats/cve-2026-44180-jupyter-enterprise-gateway-uid-gid-restriction-bypass-in) (critical, CVSS 9.8, published 16 Jul 2026) - [CVE-2026-44182: Jupyter Enterprise Gateway YAML injection in Kubernetes manifest rendering](https://junglewise.ai/threats/cve-2026-44182-jupyter-enterprise-gateway-yaml-injection-in-kubernetes-manifest) (critical, CVSS 4, published 16 Jul 2026) - [CVE-2026-35397: Jupyter Server path traversal in REST API](https://junglewise.ai/threats/cve-2026-35397-jupyter-server-path-traversal-in-rest-api) (high, CVSS 8.8, published 5 May 2026) - [CVE-2026-114135: Jupyter Server authorization bypass in kernel gateway handlers](https://junglewise.ai/threats/cve-2026-114135-jupyter-server-is-the-backend-for-jupyter-web-applications-from) (high, CVSS 8.8, published 21 Oct 2026) - [CVE-2026-40110: Jupyter Jupyter Server CORS bypass via improper Origin validation](https://junglewise.ai/threats/cve-2026-40110-jupyter-jupyter-server-cors-bypass-via-improper-origin-validation) (high, CVSS 7.3, published 5 May 2026) - [CVE-2026-114140: Jupyter nbconvert path traversal via output filename metadata](https://junglewise.ai/threats/cve-2026-114140-the-nbconvert-tool-jupyter-nbconvert-converts-jupyter-notebooks) (high, CVSS 4, published 21 Oct 2026) - [CVE-2026-5422: Jupyter jupyter-server path traversal in _get_os_path](https://junglewise.ai/threats/cve-2026-5422-jupyter-jupyter-server-path-traversal-in-get-os-path) (medium, CVSS 6.8, published 2 Jun 2026) - [CVE-2026-40934: Jupyter Server insufficient session expiration after password reset](https://junglewise.ai/threats/cve-2026-40934-jupyter-server-insufficient-session-expiration-after-password) (medium, CVSS 6.8, published 5 May 2026) - [CVE-2026-39378: nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding](https://junglewise.ai/threats/cve-2026-39378-nbconvert-has-an-arbitrary-file-read-via-path-traversal-in) (medium, CVSS 6.5, published 21 Apr 2026) ## Vulnerabilities per week 3 vulnerabilities in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 1 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 2 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Jupyter technologies - [Jupyter-Server](https://junglewise.ai/threats/technologies/jupyter-server): 9 vulnerabilities - [Jupyter Nbconvert](https://junglewise.ai/threats/technologies/jupyter-nbconvert): 4 vulnerabilities - [Jupyter Enterprise Gateway](https://junglewise.ai/threats/technologies/enterprise-gateway): 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, "Jupyter vulnerabilities", https://junglewise.ai/threats/vendors/jupyter, 13 November 2026.