{"id":"CVE-2021-33796","aliases":["DEBIAN-CVE-2021-33796","EUVD-2021-20473","GHSA-pc6c-fw6q-cfhj","UBUNTU-CVE-2021-33796"],"status":"published","title":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may...","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00713,"percentile":0.53977,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2023-07-07T17:55:00Z","modified":"2026-10-23T18:03:03Z","fixes":[{"ecosystem":"Debian:12","package":"mujs","fixed_in":["1.1.3-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mujs","fixed_in":["1.1.3-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mujs","fixed_in":["1.1.3-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"mujs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.3-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"mujs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.3-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"mujs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.3-2"}]}]}],"products":[{"vendor":"artifex","product":"mujs"},{"vendor":"mujs","product":"mujs"}],"references":[{"url":"https://github.com/ccxvii/mujs/commit/7ef066a3bb95bf83e7c5be50d859e62e58fe8515","tags":["x_transferred","Patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33796"},{"url":"https://github.com/advisories/GHSA-pc6c-fw6q-cfhj"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-33796","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-33796","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33796","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-33796","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.\n\n","status":"published","published":"2023-07-07T17:55:00.63Z","modified":"2024-11-12T19:49:00.304Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-20473","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.\n\n","status":"published","published":"2023-07-07T17:55:00Z","modified":"2024-11-12T19:49:00Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:05:03.88189Z"}],"ghsa":[{"id":"GHSA-pc6c-fw6q-cfhj","title":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may...","description":"In MuJS before 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service.\n\n","status":"published","published":"2023-07-07T18:15:09.43Z","modified":"2026-06-17T03:55:14.97Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","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"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"CVE-2021-33796","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.\n\n","status":"published","published":"2023-07-07T18:15:09.43Z","modified":"2026-10-20T14:09:43.826807904Z","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":"2026-11-02T15:44:20.13324Z"},{"id":"DEBIAN-CVE-2021-33796","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.","status":"published","published":"2023-07-07T18:15:09.43Z","modified":"2026-10-23T18:03:03.316964322Z","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":"2026-11-02T15:45:35.233346Z"},{"id":"UBUNTU-CVE-2021-33796","description":"In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.","status":"withdrawn","published":"2023-07-07T18:15:00Z","modified":"2025-07-16T08:15:43.66115Z","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":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:27.870979Z"}]}}