Detections
Analytics

SCA: security update for nbconvert (GHSA-9754-6rhw-gj3h)

medium Tenable Cloud Security Plugin ID 478623

Description

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

 - A vulnerability in jupyter/nbconvert versions <= 7.17.0 allows for Cross-site Scripting (XSS) via
 unsanitized `text/vnd.mermaid` output in HTML exports. The `data_mermaid` block in
 `share/templates/lab/base.html.j2` renders `text/vnd.mermaid` cell output directly into HTML without
 escaping, enabling attackers to inject arbitrary HTML/JavaScript by breaking out of the `<pre>` tag. This
 vulnerability impacts any server using nbconvert to render notebooks as HTML, allowing attackers to
 execute arbitrary JavaScript in the context of users viewing the HTML export. (CVE-2026-6658)

Solution

There is no known solution at this time.

See Also

https://github.com/advisories/GHSA-9754-6rhw-gj3h

Plugin Details

Severity: Medium

ID: 478623

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 11/6/2026

Updated: 11/6/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.51

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2026-6658

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/26/2026

Vulnerability Publication Date: 6/26/2026

Reference Information

CVE: CVE-2026-6658

cwe: CWE-79