Detections
Analytics

Echo: mistune: security update to 3.3.0

high Tenable Self-Hosted Container Security Plugin ID 461745

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, a run of closed tilde,
 equals-sign, or caret marker pairs around a character causes quadratic work in
 src/mistune/plugins/formatting.py when the strikethrough, mark, or insert plugin scans for matching
 markers from each possible start position, allowing denial of service through CPU exhaustion. This issue
 is fixed in version 3.3.0. (CVE-2026-59922)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-59922

Plugin Details

Severity: High

ID: 461745

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-59922

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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: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-2026-59922