Detections
Analytics

SCA: security update for markdown-it (GHSA-vfgh-jcmw-g37q)

low Tenable Self-Hosted Container Security Plugin ID 476382

Description

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

 - markdown-it is a Markdown parser. Prior to 14.3.3 and 15.0.3, when the html option or commonmark preset is
 enabled and the constructs occur inside a paragraph, attacker-controlled Markdown containing repeated
 unterminated inline HTML comments, processing instructions, declarations, or CDATA sections reaches
 src/rules_inline/html_inline.ts. Its HTML_TAG_RE match searches the remaining suffix for the appropriate
 terminator; when no terminator is present, parsing advances to the next opener and repeats the match over
 overlapping input, causing quadratic processing and denial of service through event-loop blocking or an
 unresponsive browser main thread. HTML blocks and the default HTML-disabled configuration are not affected
 by these payloads. This issue is fixed in versions 14.3.3 and 15.0.3. (CVE-2026-111766)

Solution

Update the markdown-it library and its related packages to version 14.3.3 or later.

See Also

https://github.com/advisories/GHSA-vfgh-jcmw-g37q

Plugin Details

Severity: Low

ID: 476382

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/20/2026

Updated: 10/20/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.2

Percentile: 50.39

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

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

CVSS Score Source: CVE-2026-111766

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/20/2026

Vulnerability Publication Date: 10/19/2026

Reference Information

CVE: CVE-2026-111766