Special Element Injection in notebook
Impact
Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.
Patches
5.7.11, 6.4.1
References
OWASP Page on Injection Prevention
For more information
If you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.
Credit: Guillaume Jeanne from Google
Example:
A notebook with the following content in a cell and it would display an alert when opened for the first time in Notebook (in an untrusted state):
{ "cell_type": "code", "execution_count": 0, "metadata": {}, "outputs": [ { "data": { "text/html": [ "<select><iframe></select><img src=x: onerror=alert('xss')>\n"], "text/plain": [] }, "metadata": {}, "output_type": "display_data" } ], "source": [ "" ] }Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | notebook | < 5.7.11, >= 6.0.0, < 6.4.1 | 5.7.11, 6.4.1 |
References
- https://github.com/jupyter/notebook/security/advisories/GHSA-hwvq-6gjx-j797
- https://github.com/jupyter/notebook/commit/79fc76e890a8ec42f73a3d009e44ef84c14ef0d5
- https://nvd.nist.gov/vuln/detail/CVE-2021-32798
- https://github.com/jupyter/notebook
- https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2021-118.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N- Weakness (CWE)
CWE-75, CWE-79, CWE-80- Platform
- Python (PyPI)
- Package
notebook- Disclosed
- 09.08.2021
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-118 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-hwvq-6gjx-j797 - 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.
- 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
- 2017: 0
- 2018: 3
- 2019: 4
- 2020: 1
- 2021: 2
- 2022: 2
- 2023: 0
- 2024: 3
- 2025: 0
- 2026: 4
earlier: 2
-
Special Element Injection in notebook this entry
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