CVEvulnerability

CVE-2026-48988

5.3 MEDIUM Published 2026-06-17 Modified 2026-06-24 Official page ↗
Status
Analyzed
Published
2026-06-17
Last modified
2026-06-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-400

Description

markdown-it is a Markdown parser. Versions 14.1.1 and below contain a denial-of-service vulnerability when typographer: true is enabled, due to quadratic (O(n^2)) processing in the smartquotes rule. The issue stems from repeatedly modifying strings with replaceAt(), which performs O(n) slicing and concatenation per quote character. This can cause excessive CPU consumption when parsing quote-heavy, user-supplied markdown and may let attackers degrade or disrupt service availability. Although typographer is disabled by default, many production apps enable it for smart typography, making the issue relevant. This issue has been fixed in version 14.2.0.

Affected configurations

• markdown-it project markdown-it (< 14.2.0)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References