Resource exhaustion in Asvd Microlight
CVE-2025-45526
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.
EPSS: 0.001 (2.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Asvd Microlight — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-45526?
- CVE-2025-45526 is a low-severity vulnerability in Asvd Microlight, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 2.9/10. Published 2025-06-17.
- How severe is CVE-2025-45526?
- Low severity. CVSS v3 base score is 2.9 out of 10.