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Markdown It CVE-2026-2327

MEDIUM
Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)
2026-02-12 report@snyk.io GHSA-38c4-r59v-3vqw
Denial Of Service Red Hat Markdown It Suse Markdown It Project
5.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SUSE
MEDIUM
qualitative
Red Hat
7.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:02 vuln.today
Patch released
Feb 23, 2026 - 14:08 nvd
Patch available
CVE Published
Feb 12, 2026 - 06:16 nvd
MEDIUM 5.3

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 4 npm packages depend on markdown-it (4 direct, 0 indirect)

Ecosystem-wide dependent count for version 13.0.0.

DescriptionCVE.org

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.

AnalysisAI

Markdown-It versions up to 14.1.1 is affected by inefficient regular expression complexity (redos) (CVSS 5.3).

Technical ContextAI

This vulnerability (CWE-1333: Inefficient Regular Expression Complexity (ReDoS)) exists in the linkify component. 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.

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise High Performance Computing 12 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Web and Scripting 15 SP7 Fixed
SUSE Linux Enterprise Module for Web and Scripting 15 SP7 Fixed

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CVE-2026-2327 vulnerability details – vuln.today
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