CVE-2018-19351
Jupyter Notebook before 5.7.1 allows XSS via an untrusted notebook because nbconvert responses are considered to have the same origin as the notebook server.
Does this matter?
Lower severity and a low EPSS score (1.51%). Track it; it rarely justifies an emergency change on its own.
Description
Jupyter Notebook before 5.7.1 allows XSS via an untrusted notebook because nbconvert responses are considered to have the same origin as the notebook server. In other words, nbconvert endpoints can execute JavaScript with access to the server API. In notebook/nbconvert/handlers.py, NbconvertFileHandler and NbconvertPostHandler do not set a Content Security Policy to prevent this.
- CVSS 3.0
- 6.1 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.51% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- jupyter/notebook
- Source
- cve@mitre.org
EPSS 1.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/jupyter/notebook/blob/master/docs/source/changelog.rstRelease Notes
- https://github.com/jupyter/notebook/commit/107a89fce5f413fb5728c1c5d2c7788e1fb17491Patch, Third Party Advisory
- https://groups.google.com/forum/#%21topic/jupyter/hWzu2BSsplY
- https://lists.debian.org/debian-lts-announce/2020/11/msg00033.html
- https://pypi.org/project/notebook/#historyThird Party Advisory
- https://github.com/jupyter/notebook/blob/master/docs/source/changelog.rstRelease Notes
- https://github.com/jupyter/notebook/commit/107a89fce5f413fb5728c1c5d2c7788e1fb17491Patch, Third Party Advisory
- https://groups.google.com/forum/#%21topic/jupyter/hWzu2BSsplY
- https://lists.debian.org/debian-lts-announce/2020/11/msg00033.html
- https://pypi.org/project/notebook/#historyThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.