# jupyter-server (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/pypi-jupyter-server Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/pypi-jupyter-server.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 17 vulnerabilities in jupyter-server (PyPI): 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-2026-114135, was published on 21 October 2026. 1 vulnerability in the last four weeks, level on the four before (1). ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 2 - All time: 17 (1 critical, 0 exploited in the wild) ## About jupyter-server (PyPI) Backend server for Jupyter notebook and lab environments. ## Latest jupyter-server (PyPI) vulnerabilities - [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-2026-86049: Jupyter Server token leakage in 5xx error logs](https://junglewise.ai/threats/cve-2026-86049-jupyter-server-token-leakage-in-5xx-error-logs) (high, CVSS 7.1, published 17 Sep 2026) - [CVE-2026-44727: Jupyter Server stored XSS in nbconvert handlers](https://junglewise.ai/threats/cve-2026-44727-jupyter-server-stored-xss-in-nbconvert-handlers) (critical, CVSS 4, published 22 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-2024-35178: Jupyter server on Windows discloses Windows user password hash](https://junglewise.ai/threats/cve-2024-35178-jupyter-server-on-windows-discloses-windows-user-password-hash) (low, CVSS 3.1, published 6 Jun 2024) - [CVE-2023-49080: jupyter-server errors include tracebacks with path information](https://junglewise.ai/threats/cve-2023-49080-jupyter-server-errors-include-tracebacks-with-path-information) (low, CVSS 3.1, published 4 Dec 2023) - [CVE-2023-40170: cross-site inclusion (XSSI) of files in jupyter-server](https://junglewise.ai/threats/cve-2023-40170-cross-site-inclusion-xssi-of-files-in-jupyter-server) (low, CVSS 3.1, published 28 Aug 2023) - [CVE-2023-39968: Open Redirect Vulnerability in jupyter-server](https://junglewise.ai/threats/cve-2023-39968-open-redirect-vulnerability-in-jupyter-server) (low, CVSS 3.1, published 28 Aug 2023) - [CVE-2022-29241: Jupyter server Token bruteforcing](https://junglewise.ai/threats/cve-2022-29241-jupyter-server-token-bruteforcing) (low, CVSS 3.1, published 14 Jun 2022) - [CVE-2022-24757: PYSEC-2022-179 - The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter…](https://junglewise.ai/threats/cve-2022-24757-insertion-of-sensitive-information-into-log-file-in-jupyter) (low, CVSS 3.1, published 23 Mar 2022) - [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) - [CVE-2020-26232: Open redirect in Jupyter Server](https://junglewise.ai/threats/cve-2020-26232-open-redirect-in-jupyter-server) (low, CVSS 3.1, published 24 Nov 2020) ## Most severe jupyter-server (PyPI) vulnerabilities - [CVE-2026-44727: Jupyter Server stored XSS in nbconvert handlers](https://junglewise.ai/threats/cve-2026-44727-jupyter-server-stored-xss-in-nbconvert-handlers) (critical, CVSS 4, published 22 Jun 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-2026-86049: Jupyter Server token leakage in 5xx error logs](https://junglewise.ai/threats/cve-2026-86049-jupyter-server-token-leakage-in-5xx-error-logs) (high, CVSS 7.1, published 17 Sep 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-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) - [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-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) ## Vulnerabilities per week 1 vulnerability in the last four weeks, level on the four before (1). | 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 | 1 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other PyPI technologies - [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities - [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities - [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities - [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities - [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities - [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities - [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities - [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities - [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities - [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities - [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities - [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 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-server (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-jupyter-server, 13 November 2026.