CVE-2025-45526

Published Jun 17, 2025

Last updated 21 days ago

Overview

Description
A denial of service (DoS) vulnerability has been identified in the JavaScript library microlight version 0.0.7. This library, used for syntax highlighting, does not limit the size of textual content it processes in HTML elements with the microlight class. When excessively large content (e.g., 100 million characters) is processed, the reset function in microlight.js consumes excessive memory and CPU resources, causing browser crashes or unresponsiveness. An attacker can exploit this vulnerability by tricking a user into visiting a malicious web page containing a microlight element with large content, resulting in a denial of service. NOTE: this is disputed by multiple parties because a large amount of memory and CPU resources is expected to be needed for content of that size.
Source
cve@mitre.org
NVD status
Awaiting Analysis
CNA Tags
disputed

Risk scores

CVSS 3.1

Type
Secondary
Base score
2.9
Impact score
1.4
Exploitability score
1.4
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity
LOW

Weaknesses

cve@mitre.org
CWE-770

Social media

Hype score
Not currently trending