CVE-2021-45884

7.5 highEPSS 3.1%

High (7.5) in brave brave. EPSS 3.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
CWE: CWE-200
Published: 2021-12-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

brave:brave

References

https://github.com/brave/brave-browser/issues/19070
https://github.com/brave/brave-browser/issues/20079
https://github.com/brave/brave-core/pull/10742
https://hackerone.com/reports/1377864
https://github.com/brave/brave-browser/issues/19070

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