Detections
Analytics

Echo: mistune: security update to 3.3.3

high Tenable Cloud Security Plugin ID 455547

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. Versions 3.3.0 through 3.3.2 are
 vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from
 consecutive asterisk characters, and recursive rendering in HTMLRenderer.render_token() can exceed
 Python's recursion limit and raise RecursionError, allowing crafted Markdown to crash a parsing process.
 This issue is fixed in version 3.3.3 (CVE-2026-76098)

Solution

Update the mistune library and its related packages to version 3.3.3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-76098

Plugin Details

Severity: High

ID: 455547

Version: Revision 1.2

Type: Local

Published: 10/1/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.66

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-76098

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/4/2026

Vulnerability Publication Date: 8/24/2026

Reference Information

CVE: CVE-2026-76098