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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a markdown-it affected
Version Status Constraints
13.0.0 affected < 14.1.1

No data.

No data.

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Vendors Products
Markdown-it Subscribe
Markdown-it Subscribe

Project Subscriptions

Vendors Products
Markdown-it Subscribe
Markdown-it Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917 cve-icon cve-icon cve-icon
https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33 cve-icon cve-icon
https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26 cve-icon cve-icon
https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750 cve-icon cve-icon cve-icon
History

Thu, 12 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 12 Feb 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Markdown-it
Markdown-it markdown-it
Vendors & Products Markdown-it
Markdown-it markdown-it

Thu, 12 Feb 2026 05:45:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-1333
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: snyk

Published:

Updated: 2026-02-12T14:41:53.714Z

Reserved: 2026-02-11T07:02:27.771Z

Link: CVE-2026-2327

cve-icon Vulnrichment

Updated: 2026-02-12T14:41:22.399Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-12T06:16:02.243

Modified: 2026-02-12T15:16:11.450

Link: CVE-2026-2327

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-12T09:01:59Z

Weaknesses