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Echo: mistune: security update to 3.3.0

medium Tenable Self-Hosted Container Security Plugin ID 458560

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. Prior to 3.3.0, the toc plugin and
 TableOfContents directive generate heading IDs as predictable toc_N values without slugifying the heading
 text, allowing attacker-controlled id="toc_N" content to collide with generated anchors and redirect same-
 page navigation, CSS selectors, or JavaScript handlers. This issue is fixed in version 3.3.0.
 (CVE-2026-59930)

Solution

Update the mistune library and its related packages to version 3.3.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-59930

Plugin Details

Severity: Medium

ID: 458560

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2026-59930

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.9

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2026

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-59930