Home Cyber Security News Brave Browser Tor Mode Leaked .Onion Addresses To ISP – Glitch Fixed

Brave Browser Tor Mode Leaked .Onion Addresses To ISP – Glitch Fixed

by Abeerah Hashim
brave browser leaked .onion addresses

The Brave browser offers Tor support with its private mode. It means this privacy-oriented feature with this secure browser should ensure users’ online safety. However, the Brave browser leaked .onion addresses to the public DNS servers instead of keeping them limited to Tor nodes.

Brave Browser Leaked .Onion Addresses

Brave is a secure browser that also offers Tor support with its incognito or private mode.

Ideally, this support should have kept all the users’ activities private from tracking sources or the ISPs.

However, recently, some users observed that Brave browser ironically leaked all the .onion addresses looked up via the Tor mode, to the DNS servers. This indirectly means that the browser exposed this information to the ISPs.

The users shared this information in detail in a post that they later shared on Reddit as well.

Eventually, the news gained traction and more people confirmed that the glitch exists. And that Brave actually leaked the .onion addresses.

Regarding how this would impact a user, the researcher stated,

This is especially worrisome for those of you who use Brave browser from your normal residential IP and (for whatever reason) use the Tor feature built into the browser to access Tor sites. Your ISP or DNS provider will know that a request made to a specific Tor site was made by your IP. With Brave, your ISP would know that you accessed somesketchyonionsite.onion.

Brave Rolls Out A Fix

As the matter came into Brave’s attention, they swiftly responded to the public telling them of their vigilance.

A Brave official confirmed that they already knew of this issue following a HackerOne bug report. And that they had the patch in place within the Nightly version in beta.

However, following the bug report, they upped the patch as a stable hotfix. Also, they confirmed that the glitch existed due to their adblocker.

Eventually, the team fixed this bug for all users with the release of Brave browser version 1.20.108.

Hence, now, all users should update their devices with the latest browser version at the earliest to prevent further sharing of their private .onion site queries.

You may also like

Leave a Comment

Latest Hacking News

Privacy Preference Center


The __cfduid cookie is used to identify individual clients behind a shared IP address and apply security settings on a per-client basis.

cookie_notice_accepted and gdpr[allowed_cookies] are used to identify the choices made from the user regarding cookie consent.

For example, if a visitor is in a coffee shop where there may be several infected machines, but the specific visitor's machine is trusted (for example, because they completed a challenge within your Challenge Passage period), the cookie allows Cloudflare to identify that client and not challenge them again. It does not correspond to any user ID in your web application, and does not store any personally identifiable information.

__cfduid, cookie_notice_accepted, gdpr[allowed_cookies]


DoubleClick by Google refers to the DoubleClick Digital Marketing platform which is a separate division within Google. This is Google’s most advanced advertising tools set, which includes five interconnected platform components.

DoubleClick Campaign Manager: the ad-serving platform, called an Ad Server, that delivers ads to your customers and measures all online advertising, even across screens and channels.

DoubleClick Bid Manager – the programmatic bidding platform for bidding on high-quality ad inventory from more than 47 ad marketplaces including Google Display Network.

DoubleClick Ad Exchange: the world’s largest ad marketplace for purchasing display, video, mobile, Search and even Facebook inventory.

DoubleClick Search: is more powerful than AdWords and used for purchasing search ads across Google, Yahoo, and Bing.

DoubleClick Creative Solutions: for designing, delivering and measuring rich media (video) ads, interactive and expandable ads.



The _ga is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.

The _gat global object is used to create and retrieve tracker objects, from which all other methods are invoked. Therefore the methods in this list should be run only off a tracker object created using the _gat global variable. All other methods should be called using the _gaq global object for asynchronous tracking.

_gid works as a user navigates between web pages, they can use the gtag.js tagging library to record information about the page the user has seen (for example, the page's URL) in Google Analytics. The gtag.js tagging library uses HTTP Cookies to "remember" the user's previous interactions with the web pages.

_ga, _gat, _gid