Should you update to Brave 1.91.166?
No: install Brave 1.99.55 instead. Brave 1.91.166 is a security update Brave released on 2 Jun 2026 for Mac, Windows and Linux. It fixes 429 security flaws, 22 rated critical and 87 high by Brave.[1] None of them is known to be used in attacks.
It has since been replaced by Brave 1.91.171, released 9 Jun 2026, which includes all of its fixes. If you’re on an older version, install that instead.
Should you update?
No: install Brave 1.99.55 instead. Brave 1.99.55 came out on 4 Nov 2026 and includes every fix in Brave 1.91.166, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Brave 1.91.166 still safe?
Not any more. The 32 updates since, up to Brave 1.99.55, fix 2,829 security flaws that Brave 1.91.166 doesn’t, and each became public the day its fix shipped. Installing it is safe: get it only from Brave’s own About Brave page, never from a link in an email, text or pop-up.
What it fixes
Brave lists 429 security flaws, 22 rated critical and 87 high by Brave.[1] The 109 critical and high ones are:
| Flaw | Severity | What Brave calls it |
|---|---|---|
CVE-2026-10881 | Critical | Out of bounds read and write in ANGLE |
CVE-2026-10882 | Critical | Use after free in Network |
CVE-2026-10883 | Critical | Out of bounds write in ANGLE |
CVE-2026-10884 | Critical | Use after free in Chromecast |
CVE-2026-10885 | Critical | Use after free in Chrome for iOS |
CVE-2026-10886 | Critical | Use after free in FileSystem |
CVE-2026-10887 | Critical | Use after free in Chromoting |
CVE-2026-10888 | Critical | Use after free in Cast Streaming |
CVE-2026-10889 | Critical | Out of bounds read in ANGLE |
CVE-2026-10890 | Critical | Use after free in Cast |
CVE-2026-10891 | Critical | Use after free in GFX |
CVE-2026-10892 | Critical | Out of bounds write in GPU |
CVE-2026-10893 | Critical | Use after free in Chromoting |
CVE-2026-10894 | Critical | Use after free in Printing |
CVE-2026-10895 | Critical | Use after free in Ozone |
CVE-2026-10896 | Critical | Use after free in Chrome for iOS |
CVE-2026-10897 | Critical | Out of bounds write in GPU |
CVE-2026-10898 | Critical | Stack buffer overflow in GPU |
CVE-2026-10899 | Critical | Use after free in Ozone |
CVE-2026-10900 | Critical | Use after free in Passwords |
CVE-2026-10901 | Critical | Use after free in Passwords |
CVE-2026-10902 | Critical | Use after free in Ozone |
CVE-2026-10903 | High | Use after free in WebRTC |
CVE-2026-10904 | High | Inappropriate implementation in V8 |
CVE-2026-10905 | High | Use after free in Network |
CVE-2026-10906 | High | Use after free in WebAuthentication |
CVE-2026-10907 | High | Out of bounds write in ANGLE |
CVE-2026-10908 | High | Use after free in FullScreen |
CVE-2026-10909 | High | Use after free in Dawn |
CVE-2026-10910 | High | Type Confusion in V8 |
| and 79 more | ||
How to update, and how long it takes
A minute or two. Brave restarts and reopens your tabs.
- Open Brave and click the ☰ menu at the top right.Choose About Brave. Brave looks for the update and downloads it by itself.
- Click Relaunch.Brave closes and opens again with the same tabs.
To check it worked: ☰ menu → About Brave: it shows the version, like 1.84.135, and the Chromium it’s built on. It should say 1.91.171 or later.
Before and after
- After: Brave 1.91.171, 9 Jun 2026, 74 security flaws
- Brave updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Brave. “Brave Release v1.91.166 (Chromium 149.0.7827.54)”, 2 Jun 2026.