Detections
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SCA: security update for mdast-util-to-hast (GHSA-4fh9-h7wg-q85m)

medium Tenable Self-Hosted Container Security Plugin ID 436956

Description

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

 - mdast-util-to-hast is an mdast utility to transform to hast. From 13.0.0 to before 13.2.1, multiple
 (unprefixed) classnames could be added in markdown source by using character references. This could make
 rendered user supplied markdown code elements appear like the rest of the page. This vulnerability is
 fixed in 13.2.1. (CVE-2025-66400)

See Also

https://github.com/advisories/GHSA-4fh9-h7wg-q85m

Plugin Details

Severity: Medium

ID: 436956

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 1/26/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2025-66400

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 12/2/2025

Vulnerability Publication Date: 12/1/2025

Reference Information

CVE: CVE-2025-66400