CVE-2026-2327

MEDIUM EPSS 39.2%
Published Feb 12, 20264mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 4.0
Medium
Find Similar
Published Feb 12, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
39.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-1333

Affected Products 1

VendorProductVersionRange
markdown-it_projectmarkdown-it*≥13.0.0  –  <14.1.1

References 4

  • gist.github.com https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
    Vendor Advisory
  • github.com https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33
    Broken Link
  • github.com https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26
    PatchProduct
  • security.snyk.io https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
    Third Party Advisory

Remediation

  • github.com https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26
    PatchProduct