Detections
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Echo: mistune: security update to 3.2.1

medium Tenable Cloud Security Plugin ID 465038

Description

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

 - Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in
 src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options
 directly into HTML attributes without escaping. This allows attribute injection and XSS even when
 HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains
 a patch. (CVE-2026-44896)

Solution

Update the mistune library and its related packages to version 3.2.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-44896

Plugin Details

Severity: Medium

ID: 465038

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.43

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-44896

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: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/1/2026

Vulnerability Publication Date: 5/8/2026

Reference Information

CVE: CVE-2026-44896