CVE-2021-32798: critical vulnerability in jupyter notebook
Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in notebook
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 10epss 2.1%
The Jupyter notebook is a web-based notebook environment for interactive computing. In affected versions untrusted notebook can execute code on load. Jupyter Notebook uses a deprecated version of Google Caja to sanitize user inputs. A public Caja bypass can be used to trigger an XSS when a victim opens a malicious ipynb document in Jupyter Notebook. The XSS allows an attacker to execute arbitrary code on the victim computer using Jupyter APIs.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products
jupyter · notebookRelated CVEs — jupyter notebook
In the same product, most dangerous first.
CVE-2020-26215MEDIUMOpen redirect in Jupyter NotebookEPSS 1.2%CVE-2022-29238MEDIUMForced Browsing in Jupyter NotebookEPSS 1.2%CVE-2022-24758HIGHInsertion of Sensitive Information into Log File affects Jupyter NotebookEPSS 1.1%CVE-2026-42557HIGHjupyterlab: Command linker attributes in HTML enable one-click command execution from untrusted contentEPSS 0.5%CVE-2026-40171HIGHJupyter Notebook and JupyterLab token theft via stored XSS in help command linkerEPSS 0.5%