Clipboard Vulnerability in JupyterLab Affects Multiple Versions
CVE-2026-102831

8.1HIGH

Key Information:

Vendor

Jupyterlab

Status
Jupyterlab
Notebook
Jupyterlite-core
Vendor
CVE Published:
29 September 2026

What is CVE-2026-102831?

A vulnerability in JupyterLab allows for the acceptance of attacker-controlled JSON via the system clipboard when certain features are enabled. This can result in untrusted HTML output being marked as trusted, enabling scripts to execute in the JupyterLab environment without direct user interaction. This issue affects multiple versions and is resolved in the latest updates.

Affected Version(s)

jupyterlab >= 4.5.0, < 4.5.11 < 4.5.0, 4.5.11

jupyterlab >= 4.6.0, < 4.6.4 < 4.6.0, 4.6.4

jupyterlite-core >= 0.7.0, < 0.8.4

References

https://github.com/jupyterlab/jupyterlab/security/advisor...
x_refsource_CONFIRM
https://github.com/jupyterlab/jupyterlab/commit/1a10a7da5...
x_refsource_MISC
https://github.com/jupyterlab/jupyterlab/commit/7f9f29e29...
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.