{"id":"CVE-2024-28244","aliases":["GHSA-cvr6-37gx-v8wc"],"url":"https://o3.security/vulnerability/CVE-2024-28244","summary":"KaTeX's maxExpand bypassed by Unicode sub/superscripts","details":"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.","published":"2024-03-25T19:45:50.907Z","modified":"2026-08-12T03:51:13.661560487Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.02155,"percentile":0.81286,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"katex","fixedVersion":"0.16.10"}],"fix":{"url":"https://github.com/KaTeX/KaTeX/commit/085e21b5da05414efefa932570e7201a7c70e5b2","label":"KaTeX/KaTeX@085e21b"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/28xxx/CVE-2024-28244.json"},{"type":"ADVISORY","url":"https://github.com/KaTeX/KaTeX/security/advisories/GHSA-cvr6-37gx-v8wc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-28244"},{"type":"FIX","url":"https://github.com/KaTeX/KaTeX/commit/085e21b5da05414efefa932570e7201a7c70e5b2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:13.661560487Z"}}