CVE-2024-28244: Katex

Medium severity, CVSS 6.5. EPSS: 2.2% chance of exploitation in the next 30 days.

KaTeX is a JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions could encounter malicious input using `\def` or `\newcommand` that causes a near-infinite loop, despite setting `maxExpand` to avoid such loops. KaTeX supports an option named maxExpand which aims to prevent infinitely recursive macros from consuming all available memory and/or triggering a stack overflow error. Unfortunately, support for "Unicode (sub|super)script characters" allows an attacker to bypass this limit. Each sub/superscript group instantiated a separate Parser with its own limit on macro executions, without inheriting the current count of macro executions from its parent. This has been corrected in KaTeX v0.16.10.

Affected products

• Katex Katex: from 0.15.4, before 0.16.10 (fixed in 0.16.10)

Published 2024-03-25. Last modified 2026-06-17.