{"id":"CVE-2018-21035","details":"In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (memory consumption).","modified":"2026-04-16T04:37:28.583212284Z","published":"2020-02-28T21:15:12.790Z","related":["ALSA-2020:4690"],"references":[{"type":"FIX","url":"https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735"},{"type":"EVIDENCE","url":"https://bugreports.qt.io/browse/QTBUG-70693"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qt/qtbase","events":[{"introduced":"0"},{"last_affected":"0ab53fbdda2fd7f24f45dcd52fbd195e282554da"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"5.14.1"}]}}],"versions":["v5.0.0-beta1","v5.0.0-beta2","v5.14.0-alpha1","v5.14.0-beta1","v5.14.0-beta2","v5.14.0-beta3","v5.14.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-21035.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}