CVE-2026-2327

MEDIUM

markdown-it 13.0.0-14.1.0 - Regular Expression Denial of Service via Linkify Function

Title source: llm
STIX 2.1

Description

Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.

References (4)

Core 4

Scores

CVSS v3 5.3
EPSS 0.0050
EPSS Percentile 38.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-1333
Status published
Products (2)
markdown-it_project/markdown-it 13.0.0 - 14.1.1
npm/markdown-it 13.0.0 - 14.1.1npm
Published Feb 12, 2026
Tracked Since Feb 18, 2026