CVE-2023-39663: Mathjax

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. NOTE: the vendor disputes this because the regular expressions are not applied to user input; thus, there is no risk.

Affected products

• Mathjax Mathjax: up to and including 2.7.9

Published 2023-08-29. Last modified 2026-06-17.