{"id":"CVE-2021-45884","details":"In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.","modified":"2026-04-10T04:41:43.040160Z","published":"2021-12-27T22:15:07.847Z","references":[{"type":"REPORT","url":"https://github.com/brave/brave-browser/issues/20079"},{"type":"REPORT","url":"https://hackerone.com/reports/1377864"},{"type":"FIX","url":"https://github.com/brave/brave-core/pull/10742"},{"type":"FIX","url":"https://github.com/brave/brave-browser/issues/19070"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/brave/brave-browser","events":[{"introduced":"e4d2881a3aec8fa6f5b3f454bddb602e682ed75b"},{"last_affected":"8b62af10de5cfc5eef418ab8dfd6d5b4e456bdfa"}],"database_specific":{"versions":[{"introduced":"1.17.1"},{"last_affected":"1.33.106"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45884.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:H/I:N/A:N"}]}