Information disclosure in Brave

CVE-2021-22916

In Brave Desktop between versions 1.17 and 1.26.60, when adblocking is enabled and a proxy browser extension is installed, the CNAME adblocking feature issues DNS requests that used the system DNS settings instead of the extension's proxy settings, resulting in possible information disclosure.

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.030 (86.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-22916: held from 0.030 to 0.030.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

  • Brave
  • Https://github.com/brave/brave-Core — versions Fixed in 1.26.60

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-22916?
CVE-2021-22916 is a medium-severity vulnerability in Brave, classified under Information Disclosure. CVSS score: 5.9/10. Published 2021-07-12.
How severe is CVE-2021-22916?
Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2021-22916 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.