{"id":"CVE-2021-23341","aliases":["CLSA-2026-1793304056","DEBIAN-CVE-2021-23341","EUVD-2021-0662","GHSA-h4hr-7fg3-h35w","ROOT-APP-NPM-CVE-2021-23341","UBUNTU-CVE-2021-23341"],"status":"published","title":"Regular Expression Denial of Service (ReDoS)","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.03167,"percentile":0.88112,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2021-02-18T16:00:29Z","modified":"2026-10-30T02:15:07Z","fixes":[{"ecosystem":"npm","package":"prismjs","fixed_in":["1.23.0"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"node-prismjs","fixed_in":["1.23.0+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-prismjs","fixed_in":["1.23.0+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-prismjs","fixed_in":["1.23.0+dfsg-1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"prismjs","fixed_in":["1.17.1-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/prismjs","fixed_in":["1.17.1-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.0"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.17.1-tuxcare.0"},{"fixed":"1.17.1-tuxcare.1"}]}],"versions":["1.17.1"],"bundled":6},{"source":"osv","ecosystem":"Debian:12","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.0+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.0+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.23.0+dfsg-1"}]}]},{"source":"osv","ecosystem":"npm","package":"prismjs","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.23.0"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1-root.io.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0+dfsg-2","1.11.0+dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.23.0+dfsg-1","1.25.0+dfsg-1","1.27.0+dfsg+~1.26.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.29.0+dfsg+~1.26.0-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.29.0+dfsg+~1.26.0-1","1.30.0+dfsg+~1.26.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.30.0+dfsg+~1.26.6-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"node-prismjs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.30.0+dfsg+~1.26.5-1","1.30.0+dfsg+~1.26.5-2","1.30.0+dfsg+~1.26.6-1"]}],"products":[{"vendor":"prismjs","product":"prism"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-PRISMJS-1076581","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web","report"]},{"url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web","report"]},{"url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1076583","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web","report"]},{"url":"https://github.com/PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/PrismJS/prism/issues/2583","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/PrismJS/prism/pull/2584","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23341","tags":["advisory"]},{"url":"https://www.npmjs.com/package/prismjs","tags":["web"]},{"url":"https://github.com/advisories/GHSA-h4hr-7fg3-h35w"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-23341","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-23341","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23341","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-23341","title":"Regular Expression Denial of Service (ReDoS)","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:00:29.799Z","modified":"2024-09-16T19:56:25.729Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2021-0662","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:00:29Z","modified":"2024-09-16T19:56:25Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:18.708292Z"}],"ghsa":[{"id":"GHSA-h4hr-7fg3-h35w","title":"Denial of service in prismjs","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the `prism-asciidoc`, `prism-rest`, `prism-tap` and `prism-eiffel` components.","status":"published","published":"2021-03-01T19:52:33Z","modified":"2023-09-05T22:59:25Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:37:02.632342Z"}],"nvd":[{"id":"CVE-2021-23341","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:15:14.143Z","modified":"2026-06-17T03:38:35.283Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"CVE-2021-23341","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:15:14.143Z","modified":"2026-10-20T10:54:31.803213971Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"DEBIAN-CVE-2021-23341","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:15:14.143Z","modified":"2026-10-23T18:03:12.38170145Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.637046Z"},{"id":"UBUNTU-CVE-2021-23341","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.","status":"published","published":"2021-02-18T16:15:00Z","modified":"2026-10-17T12:55:53.642527628Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"CLSA-2026-1793304056","title":"TuxCare security update for prismjs (6 CVEs)","description":"TuxCare rebuilt prismjs to address 6 CVEs. Fixed in 1.17.1-tuxcare.1.","status":"published","published":"2026-10-29T21:00:57Z","modified":"2026-10-30T02:15:07.694579967Z","updated_at":"2026-11-02T15:43:55.669514Z"},{"id":"GHSA-h4hr-7fg3-h35w","title":"Denial of service in prismjs","description":"The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the `prism-asciidoc`, `prism-rest`, `prism-tap` and `prism-eiffel` components.","status":"published","published":"2021-03-01T19:52:33Z","modified":"2025-01-14T08:57:33.682509Z","cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:48.546324Z"},{"id":"ROOT-APP-NPM-CVE-2021-23341","title":"CVE-2021-23341 in prismjs - Patched by Root","description":"Root has patched CVE-2021-23341 in the prismjs package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-08-27T18:52:03Z","modified":"2026-08-27T19:30:04.088867434Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}