Detections
Analytics

SCA: security update for @jupyter-notebook/help-extension, @jupyterlab/help-extension, jupyterlab, notebook (GHSA-rch3-82jr-f9w9)

high Tenable Cloud Security Plugin ID 441037

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the
 corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and
 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with attacker-
 controlled notebook content to steal authentication tokens with a single click. An attacker can craft a
 malicious notebook file containing elements that appear indistinguishable from legitimate controls and
 trigger execution when a user interacts with them. Successful exploitation allows theft of the user's
 authentication token and complete takeover of the Jupyter session through the REST API, including reading
 files, creating or modifying files, accessing kernels to execute arbitrary code, and creating terminals
 for shell access. This issue has been fixed in Notebook 7.5.6, JupyterLab 4.5.7, @jupyter-notebook/help-
 extension 7.5.6, and @jupyterlab/help-extension 4.5.7. As a workaround, disable the affected help
 extensions or set allowCommandLinker to false in the sanitizer configuration. (CVE-2026-40171)

Solution

Update the @jupyterlab/help-extension library and its related packages to version 4.5.7 or later.

See Also

https://github.com/advisories/GHSA-rch3-82jr-f9w9

Plugin Details

Severity: High

ID: 441037

Version: Revision 1.11

Type: Local

Family: SCA Checks

Published: 4/30/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.42

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2026-40171

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.4

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/30/2026

Vulnerability Publication Date: 4/30/2026

Reference Information

CVE: CVE-2026-40171