{"id":"GHSA-gj77-59wh-66hg","summary":"Regular Expression Denial of Service (ReDoS) in Prism","details":"Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS).\n\n### Impact\n\nWhen Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. Do not use the following languages to highlight untrusted text.\n\n- ASCIIDoc\n- ERB\n\nOther languages are __not__ affected and can be used to highlight untrusted text.\n\n### Patches\nThis problem has been fixed in Prism v1.24.\n\n### References\n\n- PrismJS/prism#2774\n- PrismJS/prism#2688\n","aliases":["CVE-2021-32723"],"modified":"2026-05-07T05:03:11.159251749Z","published":"2021-06-28T18:33:18Z","database_specific":{"cwe_ids":["CWE-400"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-06-28T18:15:20Z","nvd_published_at":"2021-06-28T20:15:00Z"},"references":[{"type":"WEB","url":"https://github.com/PrismJS/prism/security/advisories/GHSA-gj77-59wh-66hg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32723"},{"type":"WEB","url":"https://github.com/PrismJS/prism/pull/2688"},{"type":"WEB","url":"https://github.com/PrismJS/prism/pull/2774"},{"type":"WEB","url":"https://github.com/PrismJS/prism/commit/d85e30da6755fdbe7f8559f8e75d122297167018"},{"type":"PACKAGE","url":"https://github.com/PrismJS/prism"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"affected":[{"package":{"name":"prismjs","ecosystem":"npm","purl":"pkg:npm/prismjs"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.24.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-gj77-59wh-66hg/GHSA-gj77-59wh-66hg.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H"}]}