Is CVE-2026-48988 actively exploited?

No active exploitation of CVE-2026-48988 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-48988 be exploited remotely?

Yes. CVE-2026-48988 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-48988?

CVE-2026-48988 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-48988

CWE-400Published: June 17, 2026· Updated: Jun 24, 2026

5.3

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-48988 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.