HIGH 7.4
PYSEC-2026-688
JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>
Details
### Impact
Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.
### Patches
Patched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21.
### References
[OWASP Page on Restricting Form Submissions](https://cheatsheetseries.owasp.org/cheatsheets/Content_Security_Policy_Cheat_Sheet.html)
### 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
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Affected packages
References
- https://github.com/google/security-research/security/advisories/GHSA-c469-p3jp-2vhx [WEB]
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-4952-p58q-6crx [WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2021-32797 [ADVISORY]
- https://github.com/jupyterlab/jupyterlab/commit/504825938c0abfa2fb8ff8d529308830a5ae42ed [WEB]
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterlab/PYSEC-2021-130.yaml [WEB]
- https://pypi.org/project/notebook [PACKAGE]
- https://github.com/advisories/GHSA-4952-p58q-6crx [ADVISORY]