Technology · PyPI
jupyter-server (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 15 vulnerabilities in jupyter-server (PyPI): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-44727, was published on 22 June 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 1
- Exploited in the wild
- 0
Latest jupyter-server (PyPI) vulnerabilities
- CVE-2026-44727: Jupyter Server stored XSS in nbconvert handlerscriticalCVSS 4EPSS 0.4%
- CVE-2026-6657: Jupyter Jupyter Server CORS bypass via improper origin validationmediumCVSS 6.1EPSS 0.3%
- CVE-2026-5422: Jupyter jupyter-server path traversal in _get_os_pathmediumCVSS 6.8EPSS 0.5%
- CVE-2026-40934: Jupyter Server insufficient session expiration after password resetmediumCVSS 6.8EPSS 0.4%
- CVE-2026-40110: Jupyter Jupyter Server CORS bypass via improper Origin validationhighCVSS 7.3EPSS 0.5%
- CVE-2026-35397: Jupyter Server path traversal in REST APIhighCVSS 8.8EPSS 0.7%
- CVE-2025-61669: Jupyter Server open redirect in LoginFormHandler via next parametermediumCVSS 6.1EPSS 0.3%
- CVE-2024-35178: PYSEC-2024-165 - The Jupyter Server provides the backend for Jupyter web applications. Jupyter Server on Windows has a…lowCVSS 3.1EPSS 0.7%
- CVE-2023-49080: PYSEC-2023-272 - The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter…lowCVSS 3.1EPSS 0.8%
- CVE-2023-40170: PYSEC-2023-157 - jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on…lowCVSS 3.1EPSS 0.6%
- CVE-2023-39968: PYSEC-2023-155 - jupyter-server is the backend for Jupyter web applications. Open Redirect Vulnerability. Maliciously…lowCVSS 3.1EPSS 0.7%
- CVE-2022-29241: PYSEC-2022-211 - Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web…lowCVSS 3.1EPSS 0.9%
- CVE-2022-24757: PYSEC-2022-179 - The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter…lowCVSS 3.1EPSS 1.3%
- CVE-2020-26275: Jupyter Server open redirect vulnerabilitymediumCVSS 6.1EPSS 1.4%
- CVE-2020-26232: PYSEC-2020-234 - Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a…lowCVSS 3.1EPSS 1.0%
Most severe jupyter-server (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-44727: Jupyter Server stored XSS in nbconvert handlerscriticalCVSS 4EPSS 0.4%
- CVE-2026-35397: Jupyter Server path traversal in REST APIhighCVSS 8.8EPSS 0.7%
- CVE-2026-40110: Jupyter Jupyter Server CORS bypass via improper Origin validationhighCVSS 7.3EPSS 0.5%
- CVE-2026-5422: Jupyter jupyter-server path traversal in _get_os_pathmediumCVSS 6.8EPSS 0.5%
- CVE-2026-40934: Jupyter Server insufficient session expiration after password resetmediumCVSS 6.8EPSS 0.4%
- CVE-2020-26275: Jupyter Server open redirect vulnerabilitymediumCVSS 6.1EPSS 1.4%
- CVE-2026-6657: Jupyter Jupyter Server CORS bypass via improper origin validationmediumCVSS 6.1EPSS 0.3%
- CVE-2025-61669: Jupyter Server open redirect in LoginFormHandler via next parametermediumCVSS 6.1EPSS 0.3%
- CVE-2022-24757: PYSEC-2022-179 - The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter…lowCVSS 3.1EPSS 1.3%
- CVE-2020-26232: PYSEC-2020-234 - Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a…lowCVSS 3.1EPSS 1.0%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/pypi-jupyter-server.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "jupyter-server (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-jupyter-server, 27 September 2026.