{"id":"CVE-2017-18256","aliases":["EUVD-2017-9387","GHSA-57mp-vw5r-fm9q"],"status":"published","title":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource...","description":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.04842,"percentile":0.92062,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2018-04-04T02:00:00Z","modified":"2026-06-17T01:12:29Z","exploits":[{"source":"exploitdb","id":"EDB-44474","title":"Brave Browser \u003c 0.13.0 - 'long alert() argument' Denial of Service","type":"dos","platform":"windows","date":"2018-04-17","url":"https://www.exploit-db.com/exploits/44474"}],"products":[{"vendor":"brave","product":"brave_browser"}],"references":[{"url":"https://hackerone.com/reports/176066","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/44474/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18256"},{"url":"https://github.com/advisories/GHSA-57mp-vw5r-fm9q"}],"sources":{"cve":[{"id":"CVE-2017-18256","description":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.","status":"published","published":"2018-04-04T02:00:00Z","modified":"2024-08-05T21:13:49.238Z","updated_at":"2026-11-02T14:33:21.747294Z"}],"euvd":[{"id":"EUVD-2017-9387","description":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.","status":"published","published":"2018-04-04T02:00:00Z","modified":"2024-08-05T21:13:49Z","updated_at":"2026-11-03T02:23:07.6199Z"}],"ghsa":[{"id":"GHSA-57mp-vw5r-fm9q","title":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource...","description":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.","status":"published","published":"2022-05-13T01:44:38Z","modified":"2023-02-02T05:01:05Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T14:51:06.494699Z"}],"nvd":[{"id":"CVE-2017-18256","description":"Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.","status":"published","published":"2018-04-04T02:29:00.273Z","modified":"2026-06-17T01:12:29.56Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:17.032862Z"}]}}