Reverse Tabnabbing Vulnerability in JupyterLab by Project Jupyter
CVE-2025-59842

2.1LOW

Key Information:

Vendor

Jupyterlab

Status
Jupyterlab
Vendor
CVE Published:
26 September 2025

What is CVE-2025-59842?

Prior to version 4.4.8, JupyterLab did not enforce the noopener attribute on links generated through LaTeX typesetters in Markdown files, potentially exposing users to reverse tabnabbing attacks. This flaw is primarily a concern in instances where third-party LaTeX-rendering extensions generate links with a target='_blank' attribute. While this vulnerability does not affect default installations, users of these extensions should upgrade to version 4.4.8 to ensure protection against potential exploits that could compromise their sessions.

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Deploy the Patch

Affected Version(s)

jupyterlab < 4.4.8

References

https://github.com/jupyterlab/jupyterlab/security/advisor...
x_refsource_CONFIRM
https://github.com/jupyterlab/jupyterlab/commit/88ef37303...
x_refsource_MISC

CVSS V4

Score:
2.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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