{"id":"CVE-2023-39663","aliases":["GHSA-v638-q856-grg8"],"url":"https://o3.security/vulnerability/CVE-2023-39663","summary":"MathJax Regular expression Denial of Service (ReDoS)","details":"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.","published":"2023-08-29T00:00:00Z","modified":"2026-08-12T03:51:11.942149958Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"mathjax","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39663"},{"type":"REPORT","url":"https://github.com/mathjax/MathJax/issues/3074"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:11.942149958Z"}}