Yes, qBittorrent itself is a real, open-source torrent client built by volunteers since 2006, and its official site says it has no ads. The risk is mostly outside the program: what you download can carry malware, and fake download sites copy the name. It also had a security flaw that went unfixed for 14 years before version 5.0.1.
People usually ask this question after a friend tells them to install a torrent client, and then the nerves kick in. That's the right instinct with any program that connects to strangers' computers. I've read qBittorrent's official site and download page and the public record on its history, so here's a straight look at the software and the real risks.
Who makes qBittorrent and what it is
According to Wikipedia, qBittorrent is a cross-platform, free and open-source BitTorrent client written in C++. It was originally developed in 2006 by Christophe Dumez, and it's licensed under GPLv3, with its source code published on GitHub. Because the code is public, anyone can read it, and security researchers do look.
There's no company selling it. qBittorrent's official site says it's developed by volunteers in their spare time, and it asks users for donations to help it survive. The project says its aim is to provide an open-source alternative to uTorrent, and it lists "No Ads" among its features.
That last point matters because of history. Wikipedia notes that in 2012 Ghacks recommended qBittorrent to people put off by uTorrent's adware and bundleware changes, and that TechRadar's 2020 review praised its ease of use and ad-free interface.
What qBittorrent does and what it doesn't
A torrent client downloads files from other users who share pieces of them. qBittorrent supports magnet links, private torrents and encrypted connections, according to its site. It also has an optional search engine written in Python that uses user-installable plugins to search multiple torrent sites.
Those search plugins are worth thinking about. You choose which plugins to install, and the sites they search are run by other people. qBittorrent is the tool; it doesn't vet what those sites list.
The software is legal to use. Downloading copyrighted films, music, games or software without permission isn't, and it can bring warning letters from your internet provider or worse. Plenty of legal files are shared this way too, such as open-source operating systems.
The qBittorrent security flaw fixed after 14 years
Honesty matters here, so let's talk about the one serious incident. Wikipedia says qBittorrent contained a remote code execution flaw, tracked as CVE-2024-51774, caused by a failure to validate TLS certificates presented when downloading content over HTTP. It had been in the application since at least 2010, and it was fixed in version 5.0.1 in 2024, more than 14 years later.
The same article says the flaw isn't believed to have affected downloads that used the BitTorrent protocol itself. The app uses HTTPS to check for updates, to download RSS feeds and to manage its geolocation database, and that's where the weakness sat. BleepingComputer also reported the fix.
My take: a long-standing flaw is a fair mark against any project, and it's also a reminder that you should keep the app updated. The fix is in 5.0.1 and later, so make sure you're on a current version.
Where to download qBittorrent safely
Fake download sites are the main practical danger. qBittorrent's official download page lists installers for Windows and macOS, with SourceForge as the mirror. It also says that starting from v3.3.4 all source tarballs and binaries are signed with a PGP key, and it publishes SHA2-256 checksums for each version so you can check that your file matches.
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- Go to the official qBittorrent site and use its download page.
- Don't download it from an advert, a video description or a link in a message.
- If a site wraps the installer in its own downloader, close the page.
- After installing, check the version number in the About screen and update when asked.
Be especially wary of cracked or "pro" versions. The real project is free, so anyone offering a paid or premium qBittorrent is selling something else.
| What I checked | What the record shows |
|---|---|
| Who makes it? | Volunteers; first developed in 2006 by Christophe Dumez |
| Open source? | Yes, GPLv3, code on GitHub |
| Ads? | Its official site lists No Ads |
| Past security problem? | A flaw fixed in 5.0.1 in 2024 |
| Signed downloads? | PGP signed from v3.3.4, checksums published |
| Legal to use? | The software is; unauthorised downloads aren't |
Malware risk from what you download with qBittorrent
Even a clean client can fetch a dangerous file. Fake copies of films, games and software are a classic way to spread malware, and the file names often look real. Treat anything with an installer, a cracked game or a "keygen" as a high risk, however many people seem to have downloaded it.
- Don't open executable files you got from a torrent unless you trust the source.
- Keep your operating system and security software updated.
- Don't run torrents on a computer that holds work files or saved passwords.
- Use unique passwords, because malware often goes after logins. My comparison of two password managers is a good start.
Torrenting also exposes your IP address to the other people sharing a file. Some people use a VPN for privacy, and my look at two popular VPNs explains what to check before you pay for one. A VPN doesn't make an unsafe file safe, though.
My verdict on qBittorrent
As software, it's a sound choice: open source, volunteer-run, ad-free by its own description and distributed with signed downloads. I'd still keep a clear head about two things. It had a real flaw that lingered for 14 years, so keep it updated, and the files you download are where most of the danger sits. Get it only from the official site, avoid pirated content, and treat every executable with suspicion.
Frequently asked questions
Is qBittorrent free?
Yes. qBittorrent is free and open-source software, and its official site says it's developed by volunteers and asks for donations.
Does qBittorrent have ads or bundled software?
Its official site lists No Ads among its features, and Wikipedia notes that Ghacks suggested it in 2012 as an alternative for people put off by uTorrent's adware and bundleware.
Has qBittorrent ever had a security flaw?
According to Wikipedia, a remote code execution flaw (CVE-2024-51774) existed from at least 2010 and was fixed in version 5.0.1 in 2024. It isn't believed to have affected BitTorrent protocol downloads.
Where should I download qBittorrent?
From the official qBittorrent website's download page, which lists signed installers and checksums. Avoid adverts and third-party download sites.
Is it legal to use qBittorrent?
The software is legal. Downloading copyrighted material without permission isn't, and malware risk comes from the files you choose to download.
