Technology · Jupyter
Jupyter-Server vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 9 vulnerabilities in Jupyter-Server: 0 in the last 7 days and 1 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, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 1
- Exploited in the wild
- 0
About Jupyter-Server
Backend server that provides a web-based interface for Jupyter notebooks.
Latest Jupyter-Server vulnerabilities
- CVE-2026-114135: Jupyter Server authorization bypass in kernel gateway handlershighCVSS 8.8EPSS 0.4%
- 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-2020-26275: Jupyter Server open redirect vulnerabilitymediumCVSS 6.1EPSS 1.4%
Most severe Jupyter-Server 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-2026-114135: Jupyter Server authorization bypass in kernel gateway handlershighCVSS 8.8EPSS 0.4%
- 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%
Vulnerabilities per week
1 vulnerability in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 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 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 1 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Jupyter-Server vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/jupyter-server)<a href="https://junglewise.ai/threats/technologies/jupyter-server"><img src="https://junglewise.ai/threats/technologies/jupyter-server/badge.svg" alt="Jupyter-Server vulnerabilities" /></a>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/jupyter-server.json, and this page as text at https://junglewise.ai/threats/technologies/jupyter-server.md, 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 vulnerabilities", https://junglewise.ai/threats/technologies/jupyter-server, 9 November 2026.