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Medium

Jupyter Notebook XSS via untrusted notebooks

  • Disclosed: 18.11.2018
  • Updated: 11.10.2026 11:20

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.

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) notebook < 5.7.1 5.7.1

References

CVSS score 6.1/10
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
Python (PyPI)
Package
notebook
Disclosed
18.11.2018
Updated
11.10.2026 11:20

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2018-17 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-49qr-xh3w-h436 - CC BY 4.0

Vulnerability history: notebook

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (21) in the archive
Total entries
21
First → latest
09.2015 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 8
  • Medium 11
  • Low 1

Disclosures per year

earlier: 2

Severity:
  1. JupyterLab: Cross-site scripting (XSS) in JupyterLab via notebook cells pasted from the system clipboard
    High · 8.1 CVE-2026-102831 >= 7.5.0, < 7.6.3 7.6.3
  2. JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content
    High · 9.6 CVE-2026-42557 >= 7.0.0, < 7.5.6 7.5.6
  3. Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS
    High CVE-2026-40171 >= 7.0.0, < 7.5.6 7.5.6
  4. HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering
    High · 7.6 CVE-2024-43805 >= 7.0.0, < 7.2.2 7.2.2
  5. JupyterLab vulnerable to potential authentication and CSRF tokens leak
    High · 7.6 CVE-2024-22421 >= 7.0.0, < 7.0.7 7.0.7
  6. The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error i
    High · 7.5 CVE-2022-24758 < 6.4.10 6.4.10
  7. Special Element Injection in notebook
    High · 10.0 CVE-2021-32798 < 5.7.11, >= 6.0.0, < 6.4.1 5.7.11, 6.4.1
  8. Jupyter Notebook XSS via untrusted notebooks this entry
    Medium · 6.1 CVE-2018-19351 < 5.7.1 5.7.1
  9. Jupyter Notebook file bypasses sanitization, executes JavaScript
    High · 7.8 CVE-2018-8768 < 5.4.1 5.4.1
  10. Improper Input Validation in Jupyter Notebook
    Critical · 9.8 CVE-2015-7337 >= 4.0.0, < 4.0.5 4.0.5

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