CVE-2022-30334

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-05-07 · updated 2026-06-17
Weakness: CWE-200

Description

Brave before 1.34, when a Private Window with Tor Connectivity is used, leaks .onion URLs in Referer and Origin headers. NOTE: although this was fixed by Brave, the Brave documentation still advises "Note that Private Windows with Tor Connectivity in Brave are just regular private windows that use Tor as a proxy. Brave does NOT implement most of the privacy protections from Tor Browser."

Affected products

https://github.com/brave/brave-core: before 1.34 — fixed in 1.34

How to fix

Upgrade to a fixed version: https://github.com/brave/brave-core 1.34. Check the vendor advisory for mitigations.

References

https://github.com/brave/brave-browser/issues/18071
https://github.com/brave/brave-core/pull/10760
https://hackerone.com/reports/1337624
https://support.brave.com/hc/en-us/articles/360018121491-What-is-a-Private-Window-with-Tor-Connectivity-
https://github.com/brave/brave-browser/issues/18071
https://github.com/brave/brave-core/pull/10760
https://hackerone.com/reports/1337624
https://support.brave.com/hc/en-us/articles/360018121491-What-is-a-Private-Window-with-Tor-Connectivity-

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